{"title":"Fish \u0026 Aquarium Care","description":"\u003cp\u003eEverything your aquarium needs β€” all in one place. From fish antibiotics to water treatment, pH control, and tank cleaners, we've got your fish covered. Shop trusted brands and keep your aquarium thriving.\u003c\/p\u003e","products":[{"product_id":"fish-mox-250mg-capsules-for-aquarium-fish-water-care-support","title":"Fish Mox 250mg Capsules for Aquarium Fish – Water Care Support","description":"\u003cp data-end=\"1023\" data-start=\"766\"\u003eFish Mox 250mg capsules are commonly used by aquarium owners as a solution for managing bacterial infections in fish. This product is often selected for its broad-spectrum support in maintaining fish health and addressing common aquarium-related conditions.\u003c\/p\u003e\n\u003cp data-end=\"1111\" data-start=\"1025\"\u003eFish Mox is frequently used in the care of fish experiencing symptoms associated with:\u003c\/p\u003e\n\u003cul data-end=\"1195\" data-start=\"1113\"\u003e\n\u003cli data-end=\"1124\" data-start=\"1113\" data-section-id=\"ap1qow\"\u003eFin rot\u003c\/li\u003e\n\u003cli data-end=\"1137\" data-start=\"1125\" data-section-id=\"7olwr5\"\u003eTail rot\u003c\/li\u003e\n\u003cli data-end=\"1148\" data-start=\"1138\" data-section-id=\"dk8f7v\"\u003eDropsy\u003c\/li\u003e\n\u003cli data-end=\"1161\" data-start=\"1149\" data-section-id=\"1iyj0a1\"\u003eRed pest\u003c\/li\u003e\n\u003cli data-end=\"1195\" data-start=\"1162\" data-section-id=\"6a679l\"\u003eGill-related bacterial issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1405\" data-start=\"1197\"\u003eMaintaining proper water quality and early treatment is essential when managing aquarium health. Many fish owners incorporate targeted treatments alongside good tank maintenance practices to support recovery.\u003c\/p\u003e\n\u003chr data-end=\"1410\" data-start=\"1407\"\u003e\n\u003ch3 data-end=\"1435\" data-start=\"1412\" data-section-id=\"7skdi9\"\u003eπŸ§ͺ Product Details:\u003c\/h3\u003e\n\u003cul data-end=\"1590\" data-start=\"1436\"\u003e\n\u003cli data-end=\"1464\" data-start=\"1436\" data-section-id=\"eb9ijo\"\u003eStrength: 250mg capsules\u003c\/li\u003e\n\u003cli data-end=\"1501\" data-start=\"1465\" data-section-id=\"17y2wbw\"\u003eForm: Easy-to-use capsule format\u003c\/li\u003e\n\u003cli data-end=\"1564\" data-start=\"1502\" data-section-id=\"15ubkez\"\u003eUse: Aquarium fish care and bacterial condition management\u003c\/li\u003e\n\u003cli data-end=\"1590\" data-start=\"1565\" data-section-id=\"hp49xy\"\u003eManufacturer may vary\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1595\" data-start=\"1592\"\u003e\n\u003ch3 data-end=\"1620\" data-start=\"1597\" data-section-id=\"qraahi\"\u003e⚠️ Important Notes:\u003c\/h3\u003e\n\u003cul data-end=\"1788\" data-start=\"1621\"\u003e\n\u003cli data-end=\"1680\" data-start=\"1621\" data-section-id=\"1x2w3r5\"\u003eAlways monitor water parameters (ammonia, nitrites, pH)\u003c\/li\u003e\n\u003cli data-end=\"1732\" data-start=\"1681\" data-section-id=\"hbuwjr\"\u003eNot all fish conditions are bacterial in nature\u003c\/li\u003e\n\u003cli data-end=\"1788\" data-start=\"1733\" data-section-id=\"7gzn8\"\u003eProper diagnosis and care practices are recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1793\" data-start=\"1790\"\u003e\n\u003ch3 data-end=\"1820\" data-start=\"1795\" data-section-id=\"ee1hlr\"\u003eπŸ’‘ Aquarium Care Tip:\u003c\/h3\u003e\n\u003cp data-end=\"1862\" data-start=\"1821\"\u003eFor best results, combine treatment with:\u003c\/p\u003e\n\u003cul data-end=\"1940\" data-start=\"1863\"\u003e\n\u003cli data-end=\"1888\" data-start=\"1863\" data-section-id=\"jwlbaq\"\u003eRegular water changes\u003c\/li\u003e\n\u003cli data-end=\"1910\" data-start=\"1889\" data-section-id=\"1yfwysa\"\u003eProper filtration\u003c\/li\u003e\n\u003cli data-end=\"1940\" data-start=\"1911\" data-section-id=\"h7hu32\"\u003eStress reduction for fish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLooking for more fish infection treatments?\u003c\/strong\u003e \u003ca href=\"\/collections\/fish-infection-treatments\"\u003eBrowse our full collection here.\u003c\/a\u003e\u003c\/p\u003e","brand":"Paw and Tail Supply","offers":[{"title":"100 Count","offer_id":49294846198003,"sku":"748252267214","price":31.95,"currency_code":"USD","in_stock":true},{"title":"30 Count","offer_id":49294846230771,"sku":"793585088364","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/Gemini_Generated_Image_xvwpl4xvwpl4xvwp.png?v=1782340367"},{"product_id":"fish-mox-500mg-capsules-for-aquarium-fish-30-count-water-care-support","title":"Fish Mox 500mg Capsules for Aquarium Fish – 30 Count – Water Care Support","description":"\u003cp data-start=\"766\" data-end=\"1023\"\u003eFish Mox 500mg capsules are commonly used by aquarium owners as a solution for managing bacterial infections in fish. This product is often selected for its broad-spectrum support in maintaining fish health and addressing common aquarium-related conditions.\u003c\/p\u003e\n\u003cp data-start=\"1025\" data-end=\"1111\"\u003eFish Mox is frequently used in the care of fish experiencing symptoms associated with:\u003c\/p\u003e\n\u003cul data-start=\"1113\" data-end=\"1195\"\u003e\n\u003cli data-section-id=\"ap1qow\" data-start=\"1113\" data-end=\"1124\"\u003eFin rot\u003c\/li\u003e\n\u003cli data-section-id=\"7olwr5\" data-start=\"1125\" data-end=\"1137\"\u003eTail rot\u003c\/li\u003e\n\u003cli data-section-id=\"dk8f7v\" data-start=\"1138\" data-end=\"1148\"\u003eDropsy\u003c\/li\u003e\n\u003cli data-section-id=\"1iyj0a1\" data-start=\"1149\" data-end=\"1161\"\u003eRed pest\u003c\/li\u003e\n\u003cli data-section-id=\"6a679l\" data-start=\"1162\" data-end=\"1195\"\u003eGill-related bacterial issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1197\" data-end=\"1405\"\u003eMaintaining proper water quality and early treatment is essential when managing aquarium health. Many fish owners incorporate targeted treatments alongside good tank maintenance practices to support recovery.\u003c\/p\u003e\n\u003chr data-start=\"1407\" data-end=\"1410\"\u003e\n\u003ch3 data-section-id=\"7skdi9\" data-start=\"1412\" data-end=\"1435\"\u003eπŸ§ͺ Product Details:\u003c\/h3\u003e\n\u003cul data-start=\"1436\" data-end=\"1590\"\u003e\n\u003cli data-section-id=\"eb9ijo\" data-start=\"1436\" data-end=\"1464\"\u003eStrength: 500mg capsules\u003c\/li\u003e\n\u003cli data-section-id=\"17y2wbw\" data-start=\"1465\" data-end=\"1501\"\u003eForm: Easy-to-use capsule format\u003c\/li\u003e\n\u003cli data-section-id=\"15ubkez\" data-start=\"1502\" data-end=\"1564\"\u003eUse: Aquarium fish care and bacterial condition management\u003c\/li\u003e\n\u003cli data-section-id=\"hp49xy\" data-start=\"1565\" data-end=\"1590\"\u003eManufacturer may vary\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1592\" data-end=\"1595\"\u003e\n\u003ch3 data-section-id=\"qraahi\" data-start=\"1597\" data-end=\"1620\"\u003e⚠️ Important Notes:\u003c\/h3\u003e\n\u003cul data-start=\"1621\" data-end=\"1788\"\u003e\n\u003cli data-section-id=\"1x2w3r5\" data-start=\"1621\" data-end=\"1680\"\u003eAlways monitor water parameters (ammonia, nitrites, pH)\u003c\/li\u003e\n\u003cli data-section-id=\"hbuwjr\" data-start=\"1681\" data-end=\"1732\"\u003eNot all fish conditions are bacterial in nature\u003c\/li\u003e\n\u003cli data-section-id=\"7gzn8\" data-start=\"1733\" data-end=\"1788\"\u003eProper diagnosis and care practices are recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1790\" data-end=\"1793\"\u003e\n\u003ch3 data-section-id=\"ee1hlr\" data-start=\"1795\" data-end=\"1820\"\u003eπŸ’‘ Aquarium Care Tip:\u003c\/h3\u003e\n\u003cp data-start=\"1821\" data-end=\"1862\"\u003eFor best results, combine treatment with:\u003c\/p\u003e\n\u003cul data-start=\"1863\" data-end=\"1940\"\u003e\n\u003cli data-section-id=\"jwlbaq\" data-start=\"1863\" data-end=\"1888\"\u003eRegular water changes\u003c\/li\u003e\n\u003cli data-section-id=\"1yfwysa\" data-start=\"1889\" data-end=\"1910\"\u003eProper filtration\u003c\/li\u003e\n\u003cli data-section-id=\"h7hu32\" data-start=\"1911\" data-end=\"1940\"\u003eStress reduction for fish\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Paw and Tail Supply","offers":[{"title":"Default Title","offer_id":49912329306355,"sku":"806802774459","price":28.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/Gemini_Generated_Image_y5d3wty5d3wty5d3.png?v=1783982284"},{"product_id":"fish-mox-500mg-capsules-for-aquarium-fish-100-count-water-care-support","title":"Fish Mox 500mg Capsules for Aquarium Fish – 100 Count – Water Care Support","description":"\u003cp\u003eFish Mox 500 mg capsules are commonly used by aquarium owners as a solution for managing bacterial infections in fish. This product is often selected for its broad-spectrum support in maintaining fish health and addressing common aquarium-related conditions.\u003c\/p\u003e\n\u003cp\u003eFish Mox is frequently used in the care of fish experiencing symptoms associated with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFin rot\u003c\/li\u003e\n\u003cli\u003eTail rot\u003c\/li\u003e\n\u003cli\u003eDropsy\u003c\/li\u003e\n\u003cli\u003eRed pest\u003c\/li\u003e\n\u003cli\u003eGill-related bacterial issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMaintaining proper water quality and early treatment is essential when managing aquarium health. Many fish owners incorporate targeted treatments alongside good tank maintenance practices to support recovery.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eπŸ§ͺ Product Details:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStrength: 250mg capsules\u003c\/li\u003e\n\u003cli\u003eForm: Easy-to-use capsule format\u003c\/li\u003e\n\u003cli\u003eUse: Aquarium fish care and bacterial condition management\u003c\/li\u003e\n\u003cli\u003eManufacturer may vary\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e⚠️ Important Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlways monitor water parameters (ammonia, nitrites, pH)\u003c\/li\u003e\n\u003cli\u003eNot all fish conditions are bacterial in nature\u003c\/li\u003e\n\u003cli\u003eProper diagnosis and care practices are recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eπŸ’‘ Aquarium Care Tip:\u003c\/h3\u003e\n\u003cp\u003eFor best results, combine treatment with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRegular water changes\u003c\/li\u003e\n\u003cli\u003eProper filtration\u003c\/li\u003e\n\u003cli\u003eStress reduction for fish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLooking for more fish infection treatments?\u003c\/strong\u003e \u003ca href=\"\/collections\/fish-infection-treatments\"\u003eBrowse our full collection here.\u003c\/a\u003e\u003c\/p\u003e","brand":"Paw and Tail Supply","offers":[{"title":"Default Title","offer_id":49912336384243,"sku":"071362034996","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/ChatGPTImageMar27_2026_01_20_02AM.png?v=1783982400"},{"product_id":"fish-doxy-doxycycline-capsules-fish-antibiotics","title":"Fish Doxy (Doxycycline) Capsules Fish Antibiotics","description":"\u003c!-- \n SEO Title: Fish Doxy (Doxycycline) Capsules for Aquarium Fish: Dosage, Treatment Guide \u0026 Expert Comparisons\n Meta Description: Fish Doxy (Doxycycline) capsules provide versatile broad-spectrum treatment for bacterial infections in aquarium fish β€” fin rot, columnaris, septicemia, mouth rot \u0026 more. Dosage chart, step-by-step guide, comparisons \u0026 FAQs. No prescription needed.\n Primary Keyword: Fish Doxy\n Secondary Keywords: fish doxycycline, doxycycline fish antibiotics, Fish Doxy capsules, aquarium doxycycline, doxycycline for fish, tetracycline fish antibiotic, fish doxy dosage\n--\u003e\n\n\u003c!-- Schema: FAQPage --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"FAQPage\",\n \"mainEntity\": [\n {\"@type\":\"Question\",\"name\":\"What is the correct dosage of Fish Doxy for aquarium fish?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Dissolve the contents of one 100 mg capsule per 10 gallons of actual water volume. Repeat every 24 hours for 5 to 10 days, performing a 20–25% water change before each new dose.\"}},\n {\"@type\":\"Question\",\"name\":\"Is Fish Doxy safe for freshwater and saltwater aquariums?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Unlike older tetracycline hydrochloride, doxycycline is not significantly deactivated by calcium or hard water, making it effective in both freshwater and saltwater environments.\"}},\n {\"@type\":\"Question\",\"name\":\"What is the difference between Fish Doxy and Fish Mox?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fish Mox contains amoxicillin (penicillin class, bactericidal). Fish Doxy contains doxycycline (tetracycline class, bacteriostatic). Fish Doxy offers broader coverage including atypical bacteria like Chlamydia, Mycoplasma, and Rickettsia, and is preferred when the diagnosis is unclear or the infection has not responded to penicillin-class antibiotics.\"}},\n {\"@type\":\"Question\",\"name\":\"Can Fish Doxy treat columnaris?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Doxycycline is considered the most effective tetracycline-class antibiotic for columnaris. It is often recommended when standard treatments fail to control this aggressive disease.\"}},\n {\"@type\":\"Question\",\"name\":\"Will Fish Doxy discolor my aquarium water?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Doxycycline typically causes a temporary yellow or amber discoloration of aquarium water. This is harmless and clears after treatment when activated carbon filtration is restored.\"}},\n {\"@type\":\"Question\",\"name\":\"Do I need a prescription to buy Fish Doxy?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Fish Doxy is sold over-the-counter for ornamental fish use in the United States. No veterinary prescription is required.\"}}\n ]\n}\n\u003c\/script\u003e\n\n\u003c!-- Schema: Product --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"Product\",\n \"name\": \"Fish Doxy (Doxycycline) 100mg Capsules\",\n \"description\": \"Broad-spectrum tetracycline antibiotic capsules for treating bacterial infections in ornamental aquarium fish. Effective against gram-positive, gram-negative, and atypical bacteria including Chlamydia and Mycoplasma.\",\n \"category\": \"Pet Supplies \u003e Fish Supplies \u003e Fish Medications\",\n \"brand\": {\"@type\":\"Brand\",\"name\":\"Fish Doxy\"},\n \"activeIngredient\": \"Doxycycline Hyclate 100mg\"\n}\n\u003c\/script\u003e\n\n\u003c!-- Schema: HowTo --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"HowTo\",\n \"name\": \"How to Treat Aquarium Fish with Fish Doxy (Doxycycline)\",\n \"description\": \"Step-by-step guide to treating bacterial infections in aquarium fish using Fish Doxy doxycycline capsules.\",\n \"step\": [\n {\"@type\":\"HowToStep\",\"name\":\"Confirm Bacterial Infection\",\"text\":\"Look for frayed fins, discoloration, open sores, mouth erosion, lethargy, or erratic swimming. Rule out parasitic and fungal causes.\"},\n {\"@type\":\"HowToStep\",\"name\":\"Prepare a Hospital Tank\",\"text\":\"Set up a separate treatment tank. Remove activated carbon, turn off UV sterilizers, and dim lights.\"},\n {\"@type\":\"HowToStep\",\"name\":\"Calculate the Dose\",\"text\":\"Use one 100 mg capsule per 10 gallons of actual water volume.\"},\n {\"@type\":\"HowToStep\",\"name\":\"Dissolve and Administer\",\"text\":\"Open the capsule, dissolve the powder in a cup of tank water, then pour across the water surface. Water will turn yellow β€” this is normal.\"},\n {\"@type\":\"HowToStep\",\"name\":\"Repeat Daily for 5–10 Days\",\"text\":\"Perform a 20–25% water change every 24 hours, then add a fresh dose.\"},\n {\"@type\":\"HowToStep\",\"name\":\"Post-Treatment Recovery\",\"text\":\"Reintroduce carbon filtration to clear water discoloration. Add aquarium probiotics and monitor fish before returning to the main display.\"}\n ]\n}\n\u003c\/script\u003e\n\n\u003ch1\u003eFish Doxy (Doxycycline) Capsules for Aquarium Fish: Complete Dosage, Treatment \u0026amp; Comparison Guide\u003c\/h1\u003e\n\n\u003cp\u003eSome bacterial infections are straightforward β€” a clear case of fin rot that responds quickly to a first-line antibiotic. But what happens when the diagnosis is unclear, multiple pathogens may be at play, or a stubborn infection simply refuses to respond to amoxicillin or cephalexin? That is exactly when experienced aquarists turn to Fish Doxy.\u003c\/p\u003e\n\n\u003cp\u003ePowered by doxycycline hyclate β€” a versatile tetracycline antibiotic with one of the broadest spectrums of activity available in the aquarium hobby β€” Fish Doxy covers gram-positive bacteria, gram-negative bacteria, and atypical organisms like \u003cem\u003eChlamydia\u003c\/em\u003e, \u003cem\u003eMycoplasma\u003c\/em\u003e, and \u003cem\u003eRickettsia\u003c\/em\u003e that most other aquarium antibiotics simply cannot reach. It is the antibiotic you keep in your fishkeeping toolkit for the infections that other medications struggle to resolve.\u003c\/p\u003e\n\n\u003cp\u003eThis comprehensive guide covers everything you need: what Fish Doxy is and how it works, which diseases it targets, exact dosage instructions, tank preparation, critical differences from other aquarium antibiotics, and what to expect during and after treatment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notice:\u003c\/strong\u003e Fish Doxy is intended exclusively for ornamental and aquarium fish. It is not for human consumption. We do not sell or recommend this product for human use. Always consult a qualified aquatic veterinarian if you are unsure about diagnosis or treatment.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is Fish Doxy?\u003c\/h2\u003e\n\n\u003cp\u003eFish Doxy is the aquarium hobby's established trade name for doxycycline hyclate capsules formulated for ornamental fish. Doxycycline is a semi-synthetic antibiotic belonging to the tetracycline class β€” a family of medications discovered in the 1940s and prized for their exceptionally broad spectrum of antimicrobial activity.\u003c\/p\u003e\n\n\u003cp\u003eWhat sets doxycycline apart from older tetracyclines (like tetracycline hydrochloride) is its superior pharmacological profile. Doxycycline is lipid-soluble, which gives it better tissue penetration, a longer half-life, and β€” critically for aquarium use β€” it is not significantly deactivated by calcium, magnesium, or hard water. Older tetracyclines bind to dissolved minerals in aquarium water and lose effectiveness, especially in saltwater or hard freshwater. Doxycycline avoids this problem, making it the only tetracycline-class antibiotic truly suited for diverse aquarium environments.\u003c\/p\u003e\n\n\u003cp\u003eFish Doxy capsules contain 100 mg of doxycycline hyclate per capsule and are available in 30-count and 60-count bottles. The pull-apart capsule design allows the powder to be dissolved directly in tank water or mixed into fish food for targeted internal delivery.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Details at a Glance\u003c\/h3\u003e\n\n\u003ctable\u003e\n \u003cthead\u003e\n \u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n\u003ctd\u003eActive Ingredient\u003c\/td\u003e\n\u003ctd\u003eDoxycycline Hyclate 100 mg\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eDrug Class\u003c\/td\u003e\n\u003ctd\u003eTetracycline (Semi-Synthetic, Broad-Spectrum)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMechanism\u003c\/td\u003e\n\u003ctd\u003eBacteriostatic β€” inhibits bacterial protein synthesis at the 30S ribosomal subunit\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFormulation\u003c\/td\u003e\n\u003ctd\u003ePull-apart capsule (powder dissolves in water or mixes with food)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eAvailable Counts\u003c\/td\u003e\n\u003ctd\u003e30 capsules and 60 capsules\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSpectrum of Activity\u003c\/td\u003e\n\u003ctd\u003eGram-positive, gram-negative, and atypical organisms (Chlamydia, Mycoplasma, Rickettsia)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eCommon Brand Names\u003c\/td\u003e\n\u003ctd\u003eFish Doxy, Fix Doxy, Bird Biotic, Aqua Doxycycline\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRegulatory Status (USA)\u003c\/td\u003e\n\u003ctd\u003eOTC β€” no prescription required for ornamental fish\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eKnown Side Effect\u003c\/td\u003e\n\u003ctd\u003eTemporary yellow\/amber water discoloration (harmless)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eCool, dry place, away from light and moisture β€” light sensitive\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCommon Fish Diseases Treated by Fish Doxy\u003c\/h2\u003e\n\n\u003cp\u003eDoxycycline's exceptionally broad spectrum makes Fish Doxy the most versatile antibiotic in the aquarium medicine cabinet. It handles the standard bacterial pathogens that cause everyday aquarium diseases, but its real value lies in its ability to also target atypical and intracellular organisms that other antibiotics miss entirely.\u003c\/p\u003e\n\n\u003ch3\u003eColumnaris Disease\u003c\/h3\u003e\n\u003cp\u003eCaused by \u003cem\u003eFlavobacterium columnare\u003c\/em\u003e, columnaris is one of the most aggressive and feared aquarium diseases β€” producing white or grayish cotton-like patches on the skin, mouth, and fins that can kill within days. Doxycycline is widely regarded as the most effective tetracycline-class antibiotic for columnaris. Where older tetracycline hydrochloride often fails against this pathogen, Fish Doxy delivers consistent results and is frequently a first-choice treatment for this disease.\u003c\/p\u003e\n\n\u003ch3\u003eFin and Tail Rot\u003c\/h3\u003e\n\u003cp\u003eProgressive erosion of fin tissue caused by \u003cem\u003eAeromonas\u003c\/em\u003e, \u003cem\u003ePseudomonas\u003c\/em\u003e, and \u003cem\u003eFlavobacterium\u003c\/em\u003e species responds well to doxycycline's broad coverage. Fish Doxy is particularly useful for fin rot that has not responded to narrower-spectrum antibiotics, suggesting a mixed bacterial population driving the infection.\u003c\/p\u003e\n\n\u003ch3\u003eMouth Rot (Oral Bacterial Infection)\u003c\/h3\u003e\n\u003cp\u003eBacterial erosion around the mouth and jaw interferes with the fish's ability to eat and can rapidly become life-threatening. Fish Doxy's broad-spectrum activity covers the diverse range of bacteria commonly implicated in oral infections.\u003c\/p\u003e\n\n\u003ch3\u003eBacterial Gill Disease\u003c\/h3\u003e\n\u003cp\u003eLabored breathing, flared gill covers, and mucus buildup indicate gill disease. Doxycycline dissolved in water is absorbed directly through the gills, delivering the antibiotic straight to the infection site.\u003c\/p\u003e\n\n\u003ch3\u003eHemorrhagic Septicemia\u003c\/h3\u003e\n\u003cp\u003eRed streaks through fins, subcutaneous hemorrhaging, and lethargy point to septicemia β€” a systemic blood infection commonly caused by \u003cem\u003eAeromonas\u003c\/em\u003e or \u003cem\u003ePseudomonas\u003c\/em\u003e. Fish Doxy's gram-negative coverage and lipid-soluble tissue penetration make it a strong option for systemic infections.\u003c\/p\u003e\n\n\u003ch3\u003eSkin Ulcers and Open Sores\u003c\/h3\u003e\n\u003cp\u003eUlcerative lesions caused by \u003cem\u003eAeromonas hydrophila\u003c\/em\u003e or \u003cem\u003eVibrio\u003c\/em\u003e species respond to doxycycline treatment. The drug's lipid solubility allows deeper tissue penetration than many water-soluble antibiotics.\u003c\/p\u003e\n\n\u003ch3\u003ePop-Eye (Exophthalmia)\u003c\/h3\u003e\n\u003cp\u003eBulging eyes from bacterial infection behind the eye socket benefit from doxycycline's deep tissue penetration, especially when the specific pathogen is unknown or the infection involves mixed bacteria.\u003c\/p\u003e\n\n\u003ch3\u003eSwim Bladder Infections\u003c\/h3\u003e\n\u003cp\u003eWhen swim bladder dysfunction is bacterial in origin, Fish Doxy delivered through medicated food can help address the underlying infection in the internal organ.\u003c\/p\u003e\n\n\u003ch3\u003eInfections Involving Atypical Bacteria\u003c\/h3\u003e\n\u003cp\u003eThis is where Fish Doxy stands alone among aquarium antibiotics. Doxycycline is active against intracellular and atypical pathogens β€” including \u003cem\u003eChlamydia\u003c\/em\u003e, \u003cem\u003eMycoplasma\u003c\/em\u003e, and \u003cem\u003eRickettsia\u003c\/em\u003e species β€” that amoxicillin, cephalexin, and even ciprofloxacin cannot effectively target. When an infection persists despite multiple antibiotic courses, or when chronic wasting suggests an unusual pathogen, Fish Doxy may succeed where others have failed.\u003c\/p\u003e\n\n\u003ch2\u003eHow Does Fish Doxy Work?\u003c\/h2\u003e\n\n\u003cp\u003eDoxycycline is a bacteriostatic antibiotic. It stops bacteria from growing and reproducing by binding to the 30S ribosomal subunit inside bacterial cells, blocking the attachment of transfer RNA (tRNA) to the ribosome and halting protein synthesis. Without new proteins, bacteria cannot multiply, and the fish's own immune system clears the stalled infection.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey pharmacological advantages of doxycycline in aquarium use:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eReduced toxin release:\u003c\/strong\u003e Bactericidal antibiotics that kill bacteria rapidly can trigger a toxic die-off spike as endotoxins flood the water. Doxycycline's slower, growth-halting approach avoids this problem.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAnti-inflammatory properties:\u003c\/strong\u003e Tetracyclines possess immunomodulatory properties that reduce inflammation independently of antibacterial action β€” accelerating visible improvement in swollen, irritated fish tissue.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSuperior tissue penetration:\u003c\/strong\u003e Lipid-soluble doxycycline crosses cell membranes and reaches intracellular pathogens that water-soluble antibiotics cannot access.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCalcium resistance:\u003c\/strong\u003e Unlike tetracycline hydrochloride, doxycycline is not significantly deactivated by dissolved calcium and magnesium. It remains potent in hard freshwater and saltwater β€” a critical advantage for marine aquarists.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLonger half-life:\u003c\/strong\u003e Doxycycline persists in tissue longer than standard tetracycline, maintaining therapeutic levels between daily doses.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWidest coverage in the toolkit:\u003c\/strong\u003e Gram-positive, gram-negative, and atypical organisms are all within range β€” making Fish Doxy the most versatile single antibiotic available to aquarists.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFish Doxy Dosage and Administration Guide\u003c\/h2\u003e\n\n\u003cp\u003eCorrect dosing is essential. Doxycycline's bacteriostatic mechanism requires consistent therapeutic concentrations in the water to keep bacteria suppressed throughout the course.\u003c\/p\u003e\n\n\u003ch3\u003eStandard Dosage Chart\u003c\/h3\u003e\n\n\u003ctable\u003e\n \u003cthead\u003e\n \u003ctr\u003e\n\u003cth\u003eCapsule Strength\u003c\/th\u003e\n\u003cth\u003eTank Volume\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eDuration\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n\u003ctd\u003e100 mg\u003c\/td\u003e\n\u003ctd\u003e10 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e100 mg (x2)\u003c\/td\u003e\n\u003ctd\u003e20 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e100 mg (x3)\u003c\/td\u003e\n\u003ctd\u003e30 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always dose based on actual water volume. Substrate, decorations, and equipment typically reduce usable water by 15–20%.\u003c\/p\u003e\n\n\u003ch3\u003eHow to Administer Fish Doxy\u003c\/h3\u003e\n\n\u003col\u003e\n \u003cli\u003e\n\u003cstrong\u003eEstimate actual water volume.\u003c\/strong\u003e Subtract approximately 15–20% from your tank's rated capacity.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eOpen the capsule.\u003c\/strong\u003e Empty the powder into a small cup of tank water. Stir until dissolved. The water will turn yellow or amber β€” this is normal and harmless.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAdd to the aquarium.\u003c\/strong\u003e Pour evenly across the water surface or near a filter outflow.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRepeat every 24 hours\u003c\/strong\u003e for 5 to 10 days.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePerform a 20–25% water change\u003c\/strong\u003e before each new dose.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAfter the final dose,\u003c\/strong\u003e run activated carbon filtration for 24–48 hours to clear residual medication and water discoloration.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eAlternative: Medicated Food Delivery\u003c\/h3\u003e\n\u003cp\u003eFor internal infections (septicemia, swim bladder disease, chronic wasting), open the capsule and mix the powder into gel food, soaked pellets, or frozen bloodworms. Feed once daily for 5–10 days. This delivers doxycycline directly through the digestive tract for maximum internal absorption.\u003c\/p\u003e\n\n\u003ch3\u003eFreshwater vs. Saltwater Use\u003c\/h3\u003e\n\u003cp\u003eFish Doxy is one of the best antibiotic choices for saltwater aquariums. Doxycycline maintains its potency in marine environments where tetracycline hydrochloride becomes ineffective due to calcium binding. Always treat in a hospital tank when your marine system contains invertebrates or corals.\u003c\/p\u003e\n\n\u003ch2\u003eTank Preparation and Water Parameters\u003c\/h2\u003e\n\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eRemove activated carbon\u003c\/strong\u003e from all filters.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTurn off UV sterilizers.\u003c\/strong\u003e Doxycycline is photosensitive β€” UV and strong ambient light degrade it.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDim aquarium lighting\u003c\/strong\u003e or keep lights off during the treatment course to maintain drug potency.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePerform a 20–25% water change\u003c\/strong\u003e before the first dose.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTest and stabilize water parameters:\u003c\/strong\u003e ammonia and nitrite at 0 ppm, nitrate below 20 ppm, temperature stable for your species.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eUse a hospital or quarantine tank whenever possible.\u003c\/strong\u003e This isolates the sick fish, conserves medication, protects beneficial bacteria, and keeps the yellow water discoloration out of your display tank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eStep-by-Step Treatment Guide\u003c\/h2\u003e\n\n\u003ch3\u003eStep 1: Confirm the Infection Is Bacterial\u003c\/h3\u003e\n\u003cp\u003eLook for bacterial indicators: frayed fins, red streaks, open sores, discolored patches, mouth erosion, labored breathing, body swelling, or erratic swimming. Rule out fungal and parasitic causes. Fish Doxy treats bacteria β€” it has no activity against fungal pathogens.\u003c\/p\u003e\n\n\u003ch3\u003eStep 2: Consider Fish Doxy When the Diagnosis Is Unclear\u003c\/h3\u003e\n\u003cp\u003eIf you are unsure whether the pathogen is gram-positive, gram-negative, or atypical, doxycycline covers all three categories. This makes it an excellent choice for ambiguous symptoms, mixed infections, or cases that have not responded to \u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox\u003c\/a\u003e or \u003ca href=\"\/collections\/fish-flex\"\u003eFish Flex\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eStep 3: Prepare the Hospital Tank\u003c\/h3\u003e\n\u003cp\u003eSet up your treatment environment. Transfer the sick fish gently and allow 20–30 minutes for acclimation. Dim the lights to protect the medication from photodegradation.\u003c\/p\u003e\n\n\u003ch3\u003eStep 4: Calculate and Administer the First Dose\u003c\/h3\u003e\n\u003cp\u003eUse one 100 mg capsule per 10 gallons of actual water volume. Dissolve and pour across the surface. Water will turn yellow β€” expected and harmless.\u003c\/p\u003e\n\n\u003ch3\u003eStep 5: Maintain the Daily Treatment Cycle\u003c\/h3\u003e\n\u003cp\u003eEvery 24 hours: water change, test parameters, add a fresh dose. Maintain consistent temperature and low lighting.\u003c\/p\u003e\n\n\u003ch3\u003eStep 6: Monitor for Improvement\u003c\/h3\u003e\n\u003cp\u003eMost fish show visible improvement within 3 to 5 days. Signs include reduced redness, healing sores, new fin growth, increased activity, and resumed feeding. If no improvement after 5 days, discontinue and consult a veterinarian.\u003c\/p\u003e\n\n\u003ch3\u003eStep 7: Complete the Full Course\u003c\/h3\u003e\n\u003cp\u003eDoxycycline is bacteriostatic β€” it suppresses growth rather than killing outright. Stopping early lets surviving bacteria resume multiplying with potential resistance. Finish the full 5–10 day course.\u003c\/p\u003e\n\n\u003ch3\u003eStep 8: Post-Treatment Recovery\u003c\/h3\u003e\n\u003cp\u003eReintroduce activated carbon to clear medication and water color. Add aquarium probiotics to restore beneficial bacteria. Monitor fish for 48 hours in the hospital tank before returning to the main display.\u003c\/p\u003e\n\n\u003ch2\u003eSafety, Side Effects, and Precautions\u003c\/h2\u003e\n\n\u003ch3\u003eWater Discoloration\u003c\/h3\u003e\n\u003cp\u003eThe most visible side effect of Fish Doxy is temporary yellow or amber discoloration of the aquarium water. This is caused by the doxycycline itself and is completely harmless to fish. The color clears within 24–48 hours after treatment ends and activated carbon is reintroduced. For this reason alone, treating in a hospital tank is strongly recommended to avoid staining your display.\u003c\/p\u003e\n\n\u003ch3\u003eImpact on Beneficial Bacteria\u003c\/h3\u003e\n\u003cp\u003eAs a broad-spectrum antibiotic, doxycycline can significantly disrupt nitrifying bacteria β€” more so than targeted antibiotics like cephalexin. Monitor ammonia and nitrite daily during treatment. If ammonia spikes, perform an extra water change and consider dosing bottled nitrifying bacteria. This is another strong reason to treat in a hospital tank rather than your main display.\u003c\/p\u003e\n\n\u003ch3\u003eInvertebrate Sensitivity\u003c\/h3\u003e\n\u003cp\u003eDo not use Fish Doxy in tanks containing shrimp, snails, crabs, or corals. Doxycycline is harmful to invertebrates. Always use a dedicated hospital tank.\u003c\/p\u003e\n\n\u003ch3\u003eLight Sensitivity\u003c\/h3\u003e\n\u003cp\u003eDoxycycline degrades under UV and strong visible light. Keep the treatment tank dimly lit or dark during treatment to maintain the drug's potency. This is unique to Fish Doxy among aquarium antibiotics and important for treatment success.\u003c\/p\u003e\n\n\u003ch3\u003ePotential Side Effects in Fish\u003c\/h3\u003e\n\u003cp\u003eWhen dosed correctly, Fish Doxy is generally well-tolerated. Temporary effects may include reduced appetite, mild lethargy, and hiding behavior during treatment. These typically resolve once the course ends. If severe distress appears β€” gasping, erratic swimming, excessive mucus β€” perform an immediate 50% water change and run carbon.\u003c\/p\u003e\n\n\u003ch3\u003eExpired Doxycycline Warning\u003c\/h3\u003e\n\u003cp\u003eUnlike most antibiotics that simply lose potency after expiration, expired tetracyclines (including doxycycline) can potentially become toxic. Always check the expiration date before use and never administer expired Fish Doxy capsules. Dispose of expired medication responsibly.\u003c\/p\u003e\n\n\u003ch3\u003eNot Effective Against Fungal Infections\u003c\/h3\u003e\n\u003cp\u003eFish Doxy targets bacteria. For fungal conditions (cotton-like growths), use a dedicated antifungal like \u003ca href=\"\/collections\/fish-flucon\"\u003eFish Flucon (fluconazole)\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eStorage and Shelf Life\u003c\/h2\u003e\n\n\u003cp\u003eProper storage is especially important for doxycycline because it is sensitive to light, heat, and moisture. Store capsules in their original sealed container in a cool, dry place away from direct sunlight. Keep the lid tightly closed. Always verify the expiration date before use β€” expired doxycycline should not be used, as degradation products from tetracycline-class antibiotics can be harmful. Dispose of expired capsules according to local pharmaceutical waste guidelines.\u003c\/p\u003e\n\n\u003ch2\u003eFish Doxy vs. Other Aquarium Antibiotics: Choosing the Right Treatment\u003c\/h2\u003e\n\n\u003cp\u003eFish Doxy fills a unique niche: the broadest single-antibiotic coverage available in the aquarium hobby, with the versatility to handle unclear diagnoses and complex infections. Here is how it compares to the other antibiotics we carry.\u003c\/p\u003e\n\n\u003ctable\u003e\n \u003cthead\u003e\n \u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eActive Ingredient\u003c\/th\u003e\n\u003cth\u003eDrug Class\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003cth\u003eWhen to Choose\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cstrong\u003eFish Doxy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDoxycycline\u003c\/td\u003e\n\u003ctd\u003eTetracycline\u003c\/td\u003e\n \u003ctd\u003eColumnaris, mixed infections, atypical bacteria, unclear diagnosis\u003c\/td\u003e\n \u003ctd\u003eWhen the pathogen is unknown, the infection is mixed, or first-line antibiotics have failed\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAmoxicillin\u003c\/td\u003e\n\u003ctd\u003ePenicillin\u003c\/td\u003e\n \u003ctd\u003eFin rot, ulcers, dropsy, gill disease\u003c\/td\u003e\n \u003ctd\u003eFirst-line broad-spectrum choice for most general bacterial infections\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003ca href=\"\/collections\/fish-flex\"\u003eFish Flex\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eCephalexin\u003c\/td\u003e\n\u003ctd\u003eCephalosporin\u003c\/td\u003e\n \u003ctd\u003eGram-positive skin and fin infections\u003c\/td\u003e\n \u003ctd\u003eTargeted treatment with minimal tank ecology disruption\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003ca href=\"\/collections\/fish-zithro\"\u003eFish Zithro\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAzithromycin\u003c\/td\u003e\n\u003ctd\u003eMacrolide\u003c\/td\u003e\n \u003ctd\u003eResistant infections, columnaris, atypical bacteria\u003c\/td\u003e\n \u003ctd\u003eSecond-line option for stubborn or recurring infections\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003ca href=\"\/collections\/fish-flox\"\u003eFish Flox\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eCiprofloxacin\u003c\/td\u003e\n\u003ctd\u003eFluoroquinolone\u003c\/td\u003e\n \u003ctd\u003eSevere gram-negative septicemia\u003c\/td\u003e\n \u003ctd\u003eHeavy-duty option for aggressive systemic gram-negative infections\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003ca href=\"\/collections\/fish-zole\"\u003eFish Zole\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eMetronidazole\u003c\/td\u003e\n\u003ctd\u003eNitroimidazole\u003c\/td\u003e\n \u003ctd\u003eAnaerobic bacteria, hole-in-head, bloat\u003c\/td\u003e\n \u003ctd\u003eAnaerobic infections and protozoa; combinable with other antibiotics\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eOur recommendation:\u003c\/strong\u003e For most clear-cut bacterial infections, start with \u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox (amoxicillin)\u003c\/a\u003e as the first-line choice. When the diagnosis is unclear, the infection involves mixed pathogens, columnaris is suspected, or first-line treatments have failed, Fish Doxy's unmatched breadth of coverage makes it the strongest all-around option. For confirmed severe gram-negative septicemia, consider \u003ca href=\"\/collections\/fish-flox\"\u003eFish Flox (ciprofloxacin)\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eCompatibility and Drug Interactions\u003c\/h2\u003e\n\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Metronidazole (Fish Zole):\u003c\/strong\u003e A commonly used and generally safe combination. Doxycycline covers aerobic bacteria while metronidazole addresses anaerobes and protozoa. Many aquatic veterinarians recommend this pairing for complex infections.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Fish Mox or Fish Flex:\u003c\/strong\u003e Not recommended simultaneously. Use one antibiotic, complete the course, then reassess. Combining broad-spectrum doxycycline with another antibiotic significantly increases the risk to beneficial bacteria.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Aquarium Salt:\u003c\/strong\u003e Compatible. Low-dose salt (1 tablespoon per 5 gallons) supports osmoregulation without interfering with doxycycline.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Water Conditioners:\u003c\/strong\u003e Standard dechlorinators are safe. Avoid conditioners with herbal extracts or tea tree oil.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Anti-Parasitic or Anti-Fungal Medications:\u003c\/strong\u003e Do not combine. Treat one condition at a time.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFish Doxy + Calcium-Rich Supplements:\u003c\/strong\u003e While doxycycline resists calcium binding better than older tetracyclines, avoid adding calcium supplements or mineral blocks during treatment to maximize potency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSigns of Recovery and When to Seek Veterinary Help\u003c\/h2\u003e\n\n\u003ch3\u003eWhat Recovery Looks Like\u003c\/h3\u003e\n\u003cp\u003eMost fish show meaningful improvement within 3 to 5 days of starting Fish Doxy. Positive signs include increased swimming activity and appetite, reduced redness, swelling, and streaking, new translucent fin growth at previously eroded edges, healing of skin lesions and ulcers, normalized breathing and gill movement, and clearer body coloration.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Seek Professional Help\u003c\/h3\u003e\n\u003cp\u003eConsult an aquatic veterinarian if no improvement appears after 5 days, the fish worsens during treatment, multiple fish become sick simultaneously, you suspect a chronic mycobacterial or viral condition, or the problem recurs after completing a full course. The \u003ca href=\"https:\/\/www.avma.org\/resources-tools\/find-veterinarian\" target=\"_blank\" rel=\"noopener\"\u003eAmerican Veterinary Medical Association (AVMA)\u003c\/a\u003e and the \u003ca href=\"https:\/\/www.merckvetmanual.com\/exotic-and-laboratory-animals\/fish\" target=\"_blank\" rel=\"noopener\"\u003eMerck Veterinary Manual\u003c\/a\u003e are trusted resources for finding qualified aquatic professionals.\u003c\/p\u003e\n\n\u003ch2\u003eBrand Spotlight: Trusted Fish Doxy Sources\u003c\/h2\u003e\n\n\u003ch3\u003eThomas Labs \/ Bird Biotic (Legacy)\u003c\/h3\u003e\n\u003cp\u003eThomas Labs popularized the Fish Doxy name alongside its Bird Biotic doxycycline products. These set the quality standard for aquarium and avian doxycycline products for years. While Thomas Labs has ceased production, the brand names remain widely recognized.\u003c\/p\u003e\n\n\u003ch3\u003eAqua Soma Labs (Fix Doxy)\u003c\/h3\u003e\n\u003cp\u003eAqua Soma Labs produces Fix Doxy β€” the modern successor containing the same pharmaceutical-grade doxycycline hyclate at the same 100 mg strength. Distributed by Fine PetHealth Group, Fix Doxy provides reliable supply with fresh expiration dates.\u003c\/p\u003e\n\n\u003ch3\u003eQuality Indicators to Look For\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003eUSP-grade (United States Pharmacopeia) doxycycline hyclate\u003c\/li\u003e\n \u003cli\u003eClearly labeled strength and capsule count\u003c\/li\u003e\n \u003cli\u003eVerifiable manufacturer or distributor contact information\u003c\/li\u003e\n \u003cli\u003eFresh expiration dates β€” especially important for doxycycline, which should never be used past expiration\u003c\/li\u003e\n \u003cli\u003eMade in the USA under pharmaceutical-grade manufacturing conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRegulations and Legal Considerations\u003c\/h2\u003e\n\n\u003cp\u003eIn the United States, antibiotics marketed for ornamental fish β€” including doxycycline products like Fish Doxy β€” are sold over-the-counter without a prescription. They fall outside the direct regulatory scope of the FDA Center for Veterinary Medicine and USDA that governs food-animal medications.\u003c\/p\u003e\n\n\u003cp\u003eResponsible use is essential. Doxycycline's exceptionally broad spectrum makes it a powerful tool, but power demands discipline: correct diagnosis, proper dosing, completed treatment courses, and avoiding use when simpler antibiotics would suffice. These practices help preserve doxycycline's effectiveness and minimize the development of resistant bacteria.\u003c\/p\u003e\n\n\u003cp\u003eInternational regulations vary. The European Union, Australia, and Canada generally require veterinary prescriptions for tetracycline-class antibiotics. Verify local regulations before purchasing or importing.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions About Fish Doxy\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the correct dosage of Fish Doxy for aquarium fish?\u003c\/h3\u003e\n\u003cp\u003eDissolve the contents of one 100 mg capsule per 10 gallons of actual water volume. Repeat every 24 hours for 5 to 10 days, performing a 20–25% water change before each dose.\u003c\/p\u003e\n\n\u003ch3\u003eIs Fish Doxy safe for freshwater and saltwater aquariums?\u003c\/h3\u003e\n\u003cp\u003eYes. Doxycycline is not deactivated by calcium like older tetracycline hydrochloride, making it effective in both freshwater and saltwater. This is one of its key advantages over other tetracycline-class products. Always treat in a hospital tank when your marine system contains invertebrates.\u003c\/p\u003e\n\n\u003ch3\u003eWill Fish Doxy turn my water yellow?\u003c\/h3\u003e\n\u003cp\u003eYes. Doxycycline produces a temporary yellow or amber tint in aquarium water. This is completely harmless and clears once treatment ends and activated carbon is restored. Using a hospital tank keeps the discoloration out of your display.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between Fish Doxy and Fish Mox?\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox\u003c\/a\u003e contains amoxicillin (penicillin class, bactericidal) and is the standard first-line treatment for most bacterial infections. Fish Doxy contains doxycycline (tetracycline class, bacteriostatic) with broader coverage including atypical bacteria. Choose Fish Doxy when the diagnosis is unclear, the infection is mixed, or amoxicillin has failed.\u003c\/p\u003e\n\n\u003ch3\u003eCan Fish Doxy treat columnaris?\u003c\/h3\u003e\n\u003cp\u003eYes. Doxycycline is widely regarded as the most effective tetracycline for columnaris (\u003cem\u003eFlavobacterium columnare\u003c\/em\u003e). It is often a first-choice treatment for this aggressive disease.\u003c\/p\u003e\n\n\u003ch3\u003eDoes Fish Doxy harm beneficial bacteria?\u003c\/h3\u003e\n\u003cp\u003eYes, more so than targeted antibiotics like \u003ca href=\"\/collections\/fish-flex\"\u003eFish Flex (cephalexin)\u003c\/a\u003e. Monitor ammonia and nitrite daily and treat in a hospital tank whenever possible to protect your main display's nitrogen cycle.\u003c\/p\u003e\n\n\u003ch3\u003eCan I mix Fish Doxy with food?\u003c\/h3\u003e\n\u003cp\u003eYes. For internal infections, crush the capsule powder into gel food, soaked pellets, or frozen bloodworms. Feed once daily for 5–10 days.\u003c\/p\u003e\n\n\u003ch3\u003eShould I dim the lights during Fish Doxy treatment?\u003c\/h3\u003e\n\u003cp\u003eYes. Doxycycline is photosensitive and degrades under UV and strong visible light. Keep the treatment tank dimly lit or dark to maintain the drug's potency throughout the course.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use expired Fish Doxy?\u003c\/h3\u003e\n\u003cp\u003eNo. Unlike most antibiotics that simply lose potency, expired tetracyclines can become harmful. Always check the expiration date and dispose of expired capsules responsibly.\u003c\/p\u003e\n\n\u003ch3\u003eCan Fish Doxy treat fungal infections?\u003c\/h3\u003e\n\u003cp\u003eNo. Doxycycline targets bacteria only. For fungal conditions, use \u003ca href=\"\/collections\/fish-flucon\"\u003eFish Flucon (fluconazole)\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat should I do if Fish Doxy does not work?\u003c\/h3\u003e\n\u003cp\u003eIf no improvement after 5 days of correct dosing, discontinue and consult an aquatic veterinarian. Consider escalating to \u003ca href=\"\/collections\/fish-flox\"\u003eFish Flox (ciprofloxacin)\u003c\/a\u003e for gram-negative infections, or \u003ca href=\"\/collections\/fish-zithro\"\u003eFish Zithro (azithromycin)\u003c\/a\u003e for resistant strains.\u003c\/p\u003e\n\n\u003ch3\u003eDo I need a prescription to buy Fish Doxy?\u003c\/h3\u003e\n\u003cp\u003eNo. Fish Doxy is available over-the-counter for ornamental fish use in the United States. No prescription required. We ship fast with multiple delivery options.\u003c\/p\u003e\n\n\u003ch2\u003eConclusion\u003c\/h2\u003e\n\n\u003cp\u003eFish Doxy occupies a unique and essential position in the aquarium antibiotic lineup: it is the broadest-spectrum single antibiotic available to hobbyists, capable of reaching gram-positive, gram-negative, and atypical intracellular pathogens that no other common aquarium medication can touch. Its tetracycline-class mechanism, lipid-soluble tissue penetration, resistance to calcium deactivation, and anti-inflammatory properties make it the go-to choice when infections are complex, unclear, or unresponsive to standard first-line treatments.\u003c\/p\u003e\n\n\u003cp\u003eUsed responsibly β€” with accurate diagnosis when possible, proper dosing, full treatment courses, dimmed lighting, and hospital tank isolation β€” Fish Doxy gives your ornamental fish a powerful path to recovery even in the most challenging cases. Keep it in your fishkeeping first-aid kit alongside \u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox\u003c\/a\u003e and \u003ca href=\"\/collections\/fish-flex\"\u003eFish Flex\u003c\/a\u003e, and you will be prepared for virtually any bacterial emergency your aquarium throws at you.\u003c\/p\u003e\n\n\u003cp\u003eReady to treat? \u003cstrong\u003e\u003ca href=\"\/collections\/fish-doxy\"\u003eShop Fish Doxy (Doxycycline) Capsules\u003c\/a\u003e\u003c\/strong\u003e β€” 100 mg, available in 30-count and 60-count bottles, in stock, no prescription required, with fast shipping.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003ca href=\"\/collections\/fish-mox\"\u003eFish Mox (Amoxicillin) Capsules\u003c\/a\u003e β€” First-line broad-spectrum antibiotic for general bacterial infections\u003c\/li\u003e\n \u003cli\u003e\n\u003ca href=\"\/collections\/fish-flex\"\u003eFish Flex (Cephalexin) Capsules\u003c\/a\u003e β€” Targeted gram-positive treatment for fin and skin infections\u003c\/li\u003e\n \u003cli\u003e\n\u003ca href=\"\/collections\/fish-zithro\"\u003eFish Zithro (Azithromycin) Tablets\u003c\/a\u003e β€” Macrolide antibiotic for resistant and atypical infections\u003c\/li\u003e\n \u003cli\u003e\n\u003ca href=\"\/collections\/fish-flox\"\u003eFish Flox (Ciprofloxacin) Tablets\u003c\/a\u003e β€” Heavy-duty treatment for severe gram-negative septicemia\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExternal Resources\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/www.avma.org\/resources-tools\/find-veterinarian\" target=\"_blank\" rel=\"noopener\"\u003eAmerican Veterinary Medical Association (AVMA) β€” Find a Veterinarian\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/www.merckvetmanual.com\/exotic-and-laboratory-animals\/fish\" target=\"_blank\" rel=\"noopener\"\u003eMerck Veterinary Manual β€” Fish Health\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"https:\/\/www.fda.gov\/animal-veterinary\" target=\"_blank\" rel=\"noopener\"\u003eFDA Center for Veterinary Medicine\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eDisclaimer: This article is for educational purposes only and does not constitute veterinary advice. Fish Doxy and all products discussed are intended exclusively for ornamental and aquarium fish. They are not for human consumption or for use in food-producing animals. Consult a qualified aquatic veterinarian for diagnosis and treatment recommendations.\u003c\/em\u003e\u003c\/p\u003e","brand":"Fish Mox Supply","offers":[{"title":"30 Count - Tablet","offer_id":50531779739891,"sku":"FD-100-30","price":44.99,"currency_code":"USD","in_stock":true},{"title":"60 Count - Tablet","offer_id":50531779772659,"sku":"FD-100-60","price":80.99,"currency_code":"USD","in_stock":true},{"title":"100 Count - Tablet","offer_id":50531779805427,"sku":"FD-100-100","price":73.99,"currency_code":"USD","in_stock":true},{"title":"100 Count- Capsule","offer_id":50542351352051,"sku":"sku-45692677324935","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-doxy-doxycycline-100mg-30ct-front.webp?v=1787674547"},{"product_id":"fish-mox-amoxicillin-capsules-fish-antibiotics","title":"Fish Mox (Amoxicillin) Capsules Fish Antibiotics","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003cmeta name=\"description\" content=\"Learn how to use Fish Mox (Amoxicillin) to treat bacterial infections in aquarium fish. Covers dosage per gallon, fin rot treatment, tank prep, side effects, and product comparisons. 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}\n tbody tr:nth-child(even) { background: #FAFBFC; }\n\n \/* ── STEP BLOCKS ── *\/\n .step {\n display: flex;\n gap: 18px;\n margin-bottom: 28px;\n align-items: flex-start;\n }\n .step-num {\n flex-shrink: 0;\n width: 38px; height: 38px;\n background: var(--teal);\n color: #fff;\n border-radius: 50%;\n display: flex;\n align-items: center;\n justify-content: center;\n font-weight: 700;\n font-size: 15px;\n margin-top: 2px;\n }\n .step-body h3 {\n margin-top: 0;\n margin-bottom: 6px;\n font-size: 1.1rem;\n }\n .step-body p { margin-bottom: 0; }\n\n \/* ── FAQ ── *\/\n .faq-item {\n background: #fff;\n border: 1px solid var(--border);\n border-radius: 10px;\n padding: 22px 26px;\n margin-bottom: 14px;\n transition: box-shadow .2s;\n }\n .faq-item:hover { box-shadow: 0 4px 20px rgba(0,0,0,.05); }\n .faq-item h3 {\n margin: 0 0 8px;\n font-size: 1.05rem;\n color: var(--deep);\n }\n .faq-item p { margin-bottom: 0; font-size: 15.5px; color: var(--muted); }\n\n \/* ── LINKS SECTION ── *\/\n .resources {\n background: var(--sand);\n border-radius: 14px;\n padding: 32px 36px;\n margin-top: 40px;\n }\n .resources h2 { border-top: none; margin-top: 0; padding-top: 0; font-size: 1.6rem; }\n .resources a {\n color: var(--teal);\n text-decoration: none;\n font-weight: 500;\n border-bottom: 1px solid transparent;\n transition: border-color .2s;\n }\n .resources a:hover { border-bottom-color: var(--teal); }\n\n \/* ── FOOTER ── *\/\n .footer-disc {\n max-width: 900px;\n margin: 0 auto;\n padding: 32px 24px 60px;\n font-size: 13.5px;\n color: var(--muted);\n line-height: 1.8;\n border-top: 1px solid var(--border);\n }\n\n @media (max-width: 640px) {\n .toc ol { columns: 1; }\n .hero { padding: 56px 20px 48px; }\n .article { padding: 32px 16px 60px; }\n .step { flex-direction: column; gap: 8px; }\n }\n \u003c\/style\u003e\n\u003c!-- Schema: FAQPage --\u003e\u003c!-- Schema: HowTo --\u003e\u003c!-- ════════ HERO ════════ --\u003e\u003cheader class=\"hero\"\u003e\n\u003cdiv class=\"hero-inner\"\u003e\n\u003ch1\u003eFish Mox (Amoxicillin) forΒ \u003cem\u003eAquarium Fish\u003c\/em\u003e: Complete Dosage, Treatment \u0026amp; Safety Guide\u003c\/h1\u003e\n\u003cp class=\"subtitle\"\u003eEverything aquarists need to know about using Fish Mox to treat bacterial infections β€” from dosage charts and tank preparation to product comparisons and post-treatment recovery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/header\u003e\u003c!-- ════════ TABLE OF CONTENTS ════════ --\u003e\u003cnav class=\"toc\"\u003e\n\u003cdiv class=\"toc-inner\"\u003e\n\u003ch2\u003eTable of Contents\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\u003ca href=\"#what-is\"\u003eWhat Is Fish Mox?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#diseases\"\u003eCommon Fish Diseases It Treats\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#how-works\"\u003eHow Does Fish Mox Work?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#dosage\"\u003eDosage \u0026amp; Administration Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tank-prep\"\u003eTank Preparation \u0026amp; Water Parameters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#treatment-guide\"\u003eStep-by-Step Treatment Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#safety\"\u003eSafety, Side Effects \u0026amp; Precautions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#storage\"\u003eStorage \u0026amp; Shelf Life\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#comparison\"\u003eProduct Comparison\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#compatibility\"\u003eCompatibility \u0026amp; Drug Interactions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#recovery\"\u003eSigns of Recovery \u0026amp; When to Seek Help\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#brands\"\u003eBrand Spotlight\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#regulations\"\u003eRegulations \u0026amp; Legal Considerations\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#faq\"\u003eFAQ\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#conclusion\"\u003eConclusion\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#resources\"\u003eRecommended Resources\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/nav\u003e\u003c!-- ════════ ARTICLE ════════ --\u003e\n\u003carticle class=\"article\"\u003e\u003c!-- INTRO --\u003e\n\u003ch2\u003eIntroduction\u003c\/h2\u003e\n\u003cp\u003eBacterial infections rank among the leading causes of death in ornamental aquarium fish. Whether you keep a peaceful community tank of tetras and corydoras or maintain a thriving saltwater reef, a sudden outbreak of fin rot, gill disease, or septicemia can devastate your aquatic family in days. Early, accurate antibiotic treatment is often the difference between a full recovery and a total loss.\u003c\/p\u003e\n\u003cp\u003eFish Mox β€” the aquarium hobby's most widely recognized brand name for amoxicillin capsules β€” has been a cornerstone of fishkeeping medicine cabinets for decades. Trusted by hobbyists, breeders, and aquatic veterinarians alike, Fish Mox provides a pharmaceutical-grade, broad-spectrum antibiotic formulated specifically for ornamental fish. This guide covers everything you need to know: what Fish Mox is, which diseases it treats, how to dose it correctly, how to prepare your tank, and when to consider alternative medications.\u003c\/p\u003e\n\u003cdiv class=\"disclaimer\"\u003e\n\u003cstrong\u003eImportant Disclaimer:\u003c\/strong\u003e Fish Mox is intended exclusively for ornamental and aquarium fish. It is not for human consumption, and it should never be used for fish intended for the food supply. Always consult a qualified aquatic veterinarian if you are unsure about diagnosis or treatment.\u003c\/div\u003e\n\u003c!-- WHAT IS --\u003e\n\u003ch2 id=\"what-is\"\u003eWhat Is Fish Mox?\u003c\/h2\u003e\n\u003cp\u003eFish Mox is the common trade name for amoxicillin capsules marketed for use in ornamental aquarium fish. The active ingredient, amoxicillin trihydrate, belongs to the beta-lactam family of antibiotics within the broader penicillin class. It is classified as a broad-spectrum, bactericidal antibiotic, meaning it actively kills susceptible bacteria rather than merely slowing their growth.\u003c\/p\u003e\n\u003cp\u003eFish Mox capsules are available in two standard strengths β€” 250 mg and 500 mg β€” giving hobbyists the flexibility to scale dosing from small quarantine setups to large community aquariums. The capsules are designed to be pulled apart and their powder dissolved directly into tank water, where the amoxicillin disperses evenly for consistent exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand history:\u003c\/strong\u003e The Fish Mox name was originally popularized by Thomas Labs, which for years set the industry standard for over-the-counter fish antibiotics in the United States. After Thomas Labs ceased production, newer manufacturers such as Aqua Soma Labs (marketed as Fix Mox) stepped in to fill the gap with equivalent formulations containing the same active ingredient at the same dosage strengths.\u003c\/p\u003e\n\u003ch3\u003eProduct Details at a Glance\u003c\/h3\u003e\n\u003cdiv class=\"table-wrap\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Ingredient\u003c\/td\u003e\n\u003ctd\u003eAmoxicillin Trihydrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrug Class\u003c\/td\u003e\n\u003ctd\u003eBeta-Lactam \/ Penicillin (Broad-Spectrum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Strengths\u003c\/td\u003e\n\u003ctd\u003e250 mg and 500 mg capsules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormulation\u003c\/td\u003e\n\u003ctd\u003ePull-apart capsule (powder dissolves in water)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectrum of Activity\u003c\/td\u003e\n\u003ctd\u003eGram-positive and select Gram-negative bacteria\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon Brand Names\u003c\/td\u003e\n\u003ctd\u003eFish Mox, Fish Mox Forte, Fix Mox, Fin Mox, Aqua Mox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegulatory Status (USA)\u003c\/td\u003e\n\u003ctd\u003eOTC – No prescription required for ornamental fish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Conditions\u003c\/td\u003e\n\u003ctd\u003e59Β°F–86Β°F (15Β°C–30Β°C), cool and dry, lid tightly sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- COMMON DISEASES --\u003e\n\u003ch2 id=\"diseases\"\u003eCommon Fish Diseases Treated by Fish Mox\u003c\/h2\u003e\n\u003cp\u003eAmoxicillin's broad-spectrum activity makes Fish Mox effective against a wide range of bacterial conditions commonly encountered in both freshwater and saltwater aquariums. Below are the diseases aquarists most frequently treat with this antibiotic.\u003c\/p\u003e\n\u003ch3\u003eFin and Tail Rot\u003c\/h3\u003e\n\u003cp\u003eFin rot is one of the most common bacterial ailments in aquarium fish. It typically begins as fraying or whitening at the edges of fins and can progress rapidly to erosion of the entire fin structure. Causative agents often include \u003cem\u003eAeromonas\u003c\/em\u003e, \u003cem\u003ePseudomonas\u003c\/em\u003e, and \u003cem\u003eFlavobacterium\u003c\/em\u003e species. Fish Mox helps halt bacterial proliferation, allowing fin tissue to regenerate over time.\u003c\/p\u003e\n\u003ch3\u003eBacterial Gill Disease\u003c\/h3\u003e\n\u003cp\u003eGill disease manifests as labored breathing, flared gill covers, and mucus buildup on the gill filaments. It is frequently caused by \u003cem\u003eFlavobacterium branchiophilum\u003c\/em\u003e and related organisms. Because gills are in constant contact with medicated water, dissolved amoxicillin from Fish Mox reaches the infection site efficiently.\u003c\/p\u003e\n\u003ch3\u003eSkin Ulcers and Open Sores\u003c\/h3\u003e\n\u003cp\u003eUlcerative lesions β€” red, open wounds on the body or head β€” are commonly associated with \u003cem\u003eAeromonas hydrophila\u003c\/em\u003e or \u003cem\u003eVibrio\u003c\/em\u003e species. Without prompt treatment, ulcers can deepen, invite secondary fungal infection, and become life-threatening. Fish Mox targets the bacteria driving the ulcer, promoting wound closure and healing.\u003c\/p\u003e\n\u003ch3\u003eDropsy (Edema)\u003c\/h3\u003e\n\u003cp\u003eDropsy presents as severe abdominal swelling and raised, pinecone-like scales caused by internal fluid accumulation. It is often a symptom of systemic bacterial infection, frequently linked to \u003cem\u003eAeromonas\u003c\/em\u003e. While dropsy can be difficult to reverse in advanced stages, early intervention with Fish Mox may improve outcomes by reducing bacterial load.\u003c\/p\u003e\n\u003ch3\u003ePop-Eye (Exophthalmia)\u003c\/h3\u003e\n\u003cp\u003eBulging eyes in fish can result from bacterial infection behind the eye socket. Amoxicillin's ability to reach internal tissues through waterborne absorption makes Fish Mox a reasonable first-line approach, particularly when pop-eye accompanies other signs of bacterial disease.\u003c\/p\u003e\n\u003ch3\u003eColumnaris Disease\u003c\/h3\u003e\n\u003cp\u003eCaused by \u003cem\u003eFlavobacterium columnare\u003c\/em\u003e, columnaris produces white or grayish patches on the skin, fins, and mouth that may resemble fungal growth. It spreads rapidly in warm water. Fish Mox can be effective against columnaris, especially when caught early, though severe cases may require combination therapy.\u003c\/p\u003e\n\u003ch3\u003eHemorrhagic Septicemia\u003c\/h3\u003e\n\u003cp\u003eRed streaks through fins, skin hemorrhaging, and lethargy often indicate bacterial septicemia β€” a systemic blood infection. \u003cem\u003eAeromonas\u003c\/em\u003e and \u003cem\u003ePseudomonas\u003c\/em\u003e are frequent culprits. Fish Mox provides systemic coverage through waterborne absorption, helping to reduce the circulating bacterial load.\u003c\/p\u003e\n\u003c!-- HOW IT WORKS --\u003e\n\u003ch2 id=\"how-works\"\u003eHow Does Fish Mox Work?\u003c\/h2\u003e\n\u003cp\u003eAmoxicillin is a bactericidal antibiotic, meaning it kills bacteria outright rather than simply preventing them from reproducing. It achieves this by interfering with the synthesis of peptidoglycan, a critical structural component of bacterial cell walls. Without an intact cell wall, bacteria cannot maintain osmotic pressure, and they lyse (burst) and die.\u003c\/p\u003e\n\u003cp\u003eThis mechanism is particularly effective against Gram-positive bacteria, which rely heavily on thick peptidoglycan layers for structural integrity. It also shows activity against certain Gram-negative species, including \u003cem\u003eAeromonas\u003c\/em\u003e and some \u003cem\u003ePseudomonas\u003c\/em\u003e strains, though Gram-negative bacteria have an additional outer membrane that can limit penetration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbsorption in aquatic environments:\u003c\/strong\u003e When Fish Mox capsule powder is dissolved in aquarium water, the amoxicillin is absorbed through the fish's gills and, to a lesser extent, through the skin. This constant exposure to medicated water provides sustained drug delivery β€” a key advantage in treating aquatic animals that cannot swallow pills.\u003c\/p\u003e\n\u003c!-- DOSAGE --\u003e\n\u003ch2 id=\"dosage\"\u003eFish Mox Dosage and Administration Guide\u003c\/h2\u003e\n\u003cp\u003eCorrect dosing is critical. Underdosing fails to control the infection and promotes antibiotic resistance, while overdosing can crash beneficial bacteria and destabilize your tank's nitrogen cycle. Follow the guidelines below for safe, effective treatment.\u003c\/p\u003e\n\u003ch3\u003eStandard Dosage Chart\u003c\/h3\u003e\n\u003cdiv class=\"table-wrap\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCapsule Strength\u003c\/th\u003e\n\u003cth\u003eTank Volume\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eDuration\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e250 mg\u003c\/td\u003e\n\u003ctd\u003e10 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mg\u003c\/td\u003e\n\u003ctd\u003e20 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mg (Forte)\u003c\/td\u003e\n\u003ctd\u003e20 gallons\u003c\/td\u003e\n\u003ctd\u003eEvery 24 hours\u003c\/td\u003e\n\u003ctd\u003e5–10 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHow to Administer Fish Mox\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eCalculate your actual water volume. Decorations, substrate, and equipment reduce usable water. A 20-gallon tank may hold only 15–17 gallons of actual water.\u003c\/li\u003e\n\u003cli\u003eOpen the capsule and dissolve the powder in a small cup of tank water first. Stir until fully dispersed before adding to the aquarium.\u003c\/li\u003e\n\u003cli\u003ePour the dissolved solution evenly across the water surface or near a filter outflow to help distribute medication.\u003c\/li\u003e\n\u003cli\u003eRepeat dosing every 24 hours for a minimum of 5 days, extending to 10 days for severe infections.\u003c\/li\u003e\n\u003cli\u003ePerform a 20–25% partial water change before each new dose to remove metabolized medication and waste products.\u003c\/li\u003e\n\u003cli\u003eAfter completing the full treatment course, run activated carbon filtration for 24–48 hours to strip residual amoxicillin from the water.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eFreshwater vs. Saltwater Considerations\u003c\/h3\u003e\n\u003cp\u003eFish Mox dissolves effectively in both freshwater and saltwater environments. However, saltwater tanks often house more sensitive species (corals, invertebrates) that may be adversely affected. Whenever possible, treat fish in a separate hospital or quarantine tank to avoid exposing non-target organisms to antibiotics.\u003c\/p\u003e\n\u003c!-- TANK PREP --\u003e\n\u003ch2 id=\"tank-prep\"\u003eTank Preparation and Water Parameters\u003c\/h2\u003e\n\u003cp\u003eProper tank preparation maximizes the effectiveness of Fish Mox and reduces stress on your fish during treatment. Skipping these steps is one of the most common reasons antibiotic courses fail.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove activated carbon\u003c\/strong\u003e from all filters. Carbon adsorbs medications and will neutralize the amoxicillin before it can work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTurn off UV sterilizers.\u003c\/strong\u003e Ultraviolet light can degrade certain antibiotics, reducing their potency in the water column.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerform a 20–25% water change\u003c\/strong\u003e before the first dose. This improves water quality and reduces organic load that competes with the drug.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest and stabilize water parameters.\u003c\/strong\u003e Ensure ammonia and nitrite read 0 ppm, nitrate is below 20 ppm, and temperature is stable (typically 75Β°F–82Β°F \/ 24Β°C–28Β°C for tropical freshwater fish).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintain pH stability.\u003c\/strong\u003e Amoxicillin performs best in neutral to slightly alkaline water (pH 7.0–8.0). Extreme pH swings during treatment add stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet up a hospital tank if possible.\u003c\/strong\u003e A bare-bottom 10–20 gallon tank with a sponge filter and heater is ideal. It isolates the sick fish, reduces medication waste, and protects healthy tankmates and beneficial bacteria in your main display.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- STEP-BY-STEP TREATMENT --\u003e\n\u003ch2 id=\"treatment-guide\"\u003eStep-by-Step Treatment Guide: Using Fish Mox From Start to Finish\u003c\/h2\u003e\n\u003cp\u003eThis section walks you through the entire treatment process, from the moment you notice symptoms to post-treatment recovery.\u003c\/p\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e1\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eIdentify the Problem\u003c\/h3\u003e\n\u003cp\u003eConfirm that symptoms are bacterial in origin. Common bacterial indicators include frayed or dissolving fins, red streaks, open sores, body swelling, bulging eyes, and labored breathing with visible gill irritation. If you see white cotton-like tufts (likely fungal) or tiny white spots resembling grains of salt (likely Ich, a parasite), Fish Mox is not the correct treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e2\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003ePrepare the Treatment Environment\u003c\/h3\u003e\n\u003cp\u003eSet up your hospital tank or prepare your main aquarium as described in the tank preparation section above. Ensure the heater is working, the sponge filter is running, and you have removed all chemical filtration media.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e3\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eCalculate the Dose\u003c\/h3\u003e\n\u003cp\u003eMeasure or estimate the actual water volume. Use one 250 mg capsule per 10 gallons or one 500 mg capsule per 20 gallons. If your hospital tank holds 15 gallons, use one 250 mg capsule plus half of another.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e4\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eDissolve and Add the Medication\u003c\/h3\u003e\n\u003cp\u003eEmpty the capsule contents into a small cup of tank water. Stir thoroughly until the powder dissolves completely β€” this prevents undissolved clumps from settling on fish or substrate. Pour the solution across the water surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e5\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eDaily Treatment Cycle\u003c\/h3\u003e\n\u003cp\u003eEvery 24 hours, perform a 20–25% water change, then add a fresh dose. This cycle refreshes the antibiotic concentration and removes metabolic waste. Maintain consistent water temperature throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e6\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eMonitor and Assess\u003c\/h3\u003e\n\u003cp\u003eObserve your fish closely during treatment. Look for signs of improvement: increased activity, resumed feeding, reduced redness or swelling, and fin tissue beginning to regenerate. If no improvement is seen after five full days, discontinue Fish Mox and consult an aquatic veterinarian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e7\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003eComplete the Course\u003c\/h3\u003e\n\u003cp\u003eEven if symptoms improve early, continue treatment for the full recommended duration (minimum 5 days). Stopping early allows surviving bacteria to repopulate, potentially with acquired resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"step\"\u003e\n\u003cdiv class=\"step-num\"\u003e8\u003c\/div\u003e\n\u003cdiv class=\"step-body\"\u003e\n\u003ch3\u003ePost-Treatment Recovery\u003c\/h3\u003e\n\u003cp\u003eAfter the final dose, reintroduce activated carbon filtration to remove residual medication. Add a quality aquarium probiotic to help restore beneficial bacteria. Gradually transition the fish back to the main display over 24–48 hours, monitoring closely for any relapse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SAFETY --\u003e\n\u003ch2 id=\"safety\"\u003eSafety, Side Effects, and Precautions\u003c\/h2\u003e\n\u003cp\u003eFish Mox is generally well-tolerated when used according to directions. However, like all antibiotics, it carries certain risks that responsible aquarists should understand.\u003c\/p\u003e\n\u003ch3\u003eEffects on Beneficial Bacteria\u003c\/h3\u003e\n\u003cp\u003eAmoxicillin is not selective β€” it can affect the nitrifying bacteria (\u003cem\u003eNitrosomonas\u003c\/em\u003e, \u003cem\u003eNitrobacter\u003c\/em\u003e) that drive your aquarium's nitrogen cycle. During and after treatment, monitor ammonia and nitrite levels daily. If ammonia spikes, perform additional water changes and consider dosing with a commercial nitrifying bacteria supplement.\u003c\/p\u003e\n\u003ch3\u003eInvertebrate Sensitivity\u003c\/h3\u003e\n\u003cp\u003eFish Mox is formulated for fish and has not been tested for safety in invertebrates such as shrimp, snails, crabs, and corals. Do not treat community tanks containing sensitive invertebrates. Always use a dedicated hospital tank.\u003c\/p\u003e\n\u003ch3\u003eScaleless and Sensitive Species\u003c\/h3\u003e\n\u003cp\u003eScaleless fish (loaches, catfish, eels) and certain sensitive species may respond differently to medications. While amoxicillin is generally safe, monitor these fish especially closely and consult a veterinarian if you have concerns.\u003c\/p\u003e\n\u003ch3\u003eAllergic Reactions in Fish\u003c\/h3\u003e\n\u003cp\u003eThough rare, some fish may show signs of medication intolerance, including excessive mucus production, erratic swimming, or rapid gill movement unrelated to the original disease. If these symptoms appear, perform an immediate large water change (50%) and run activated carbon.\u003c\/p\u003e\n\u003ch3\u003eAntibiotic Resistance\u003c\/h3\u003e\n\u003cp\u003eUsing Fish Mox at sub-therapeutic doses, for too short a duration, or when the infection is not bacterial contributes to the development of antibiotic-resistant bacteria. Always dose correctly and complete the full course.\u003c\/p\u003e\n\u003c!-- STORAGE --\u003e\n\u003ch2 id=\"storage\"\u003eStorage and Shelf Life\u003c\/h2\u003e\n\u003cp\u003eProper storage preserves Fish Mox's potency throughout its shelf life. Store capsules in their original sealed container in a cool, dry location between 59Β°F and 86Β°F (15Β°C–30Β°C). Avoid exposure to direct sunlight, excessive humidity, and temperature extremes. Keep the container tightly closed after each use.\u003c\/p\u003e\n\u003cp\u003eAmoxicillin degrades over time, particularly in warm or humid environments. Always check the expiration date before use. Expired capsules may have reduced potency and should be disposed of responsibly according to local pharmaceutical waste regulations β€” never flush unused medication or pour it directly into waterways.\u003c\/p\u003e\n\u003c!-- PRODUCT COMPARISON --\u003e\n\u003ch2 id=\"comparison\"\u003eFish Mox vs. Other Aquarium Antibiotics: Which One Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eFish Mox is a fantastic first-line antibiotic, but it is not the only option available to aquarists. The table below compares the most commonly used aquarium antibiotics to help you select the right medication for the situation.\u003c\/p\u003e\n\u003cdiv class=\"table-wrap\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eActive Ingredient\u003c\/th\u003e\n\u003cth\u003eSpectrum\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFish Mox\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmoxicillin\u003c\/td\u003e\n\u003ctd\u003eBroad (G+ \u0026amp; some Gβˆ’)\u003c\/td\u003e\n\u003ctd\u003eFin rot, ulcers, dropsy, gill disease\u003c\/td\u003e\n\u003ctd\u003eFirst-line choice for most bacterial infections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFish Flex\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCephalexin\u003c\/td\u003e\n\u003ctd\u003eGram-positive focused\u003c\/td\u003e\n\u003ctd\u003eSkin, fin, and gill infections\u003c\/td\u003e\n\u003ctd\u003eTargeted; less disruption to broad bacterial flora\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFish Flox\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCiprofloxacin\u003c\/td\u003e\n\u003ctd\u003eBroad (strong Gβˆ’)\u003c\/td\u003e\n\u003ctd\u003eSepticemia, systemic Gram-negative\u003c\/td\u003e\n\u003ctd\u003eReserve for severe or resistant infections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFish Doxy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDoxycycline\u003c\/td\u003e\n\u003ctd\u003eBroad-spectrum\u003c\/td\u003e\n\u003ctd\u003eStubborn or mixed infections\u003c\/td\u003e\n\u003ctd\u003eTetracycline class; bacteriostatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFish Zole\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetronidazole\u003c\/td\u003e\n\u003ctd\u003eAnaerobic bacteria \u0026amp; protozoa\u003c\/td\u003e\n\u003ctd\u003eHole-in-head, bloat, anaerobic infections\u003c\/td\u003e\n\u003ctd\u003eCan be combined with Fish Mox for dual coverage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral guidance:\u003c\/strong\u003e Start with Fish Mox for most suspected bacterial infections. If symptoms point specifically to Gram-negative septicemia or if Fish Mox fails after a full course, escalate to Fish Flox (ciprofloxacin). For targeted Gram-positive infections with minimal ecological disruption, consider Fish Flex (cephalexin).\u003c\/p\u003e\n\u003c!-- COMPATIBILITY --\u003e\n\u003ch2 id=\"compatibility\"\u003eCompatibility and Drug Interactions\u003c\/h2\u003e\n\u003cp\u003eCombining aquarium medications without professional guidance can produce unpredictable β€” and potentially lethal β€” results. Follow these general compatibility guidelines:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish Mox + Metronidazole (Fish Zole):\u003c\/strong\u003e Generally considered safe in combination. This pairing provides coverage against both aerobic and anaerobic bacteria. Many aquatic veterinarians use this combination for complex infections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish Mox + Fish Flex or Fish Flox:\u003c\/strong\u003e Avoid combining multiple antibiotics unless directed by a veterinarian. Overlapping mechanisms can disrupt the nitrogen cycle more severely and may not improve outcomes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish Mox + Aquarium Salt:\u003c\/strong\u003e Generally compatible. Low-dose aquarium salt (1 tablespoon per 5 gallons) can support osmoregulation in stressed fish without interfering with amoxicillin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish Mox + Water Conditioners:\u003c\/strong\u003e Standard dechlorinators (sodium thiosulfate-based) are safe to use during treatment. Avoid conditioners containing herbal extracts or tea tree oil, which may interact with antibiotics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFish Mox + Anti-Parasitic Medications:\u003c\/strong\u003e Do not combine. Treat one condition at a time. If your fish has both bacterial and parasitic infections, address the most life-threatening condition first.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- RECOVERY --\u003e\n\u003ch2 id=\"recovery\"\u003eSigns of Recovery and When to Seek Veterinary Help\u003c\/h2\u003e\n\u003ch3\u003eWhat Improvement Looks Like\u003c\/h3\u003e\n\u003cp\u003eSuccessful treatment with Fish Mox typically produces visible improvement within three to five days. Signs to watch for include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased swimming activity and interest in food\u003c\/li\u003e\n\u003cli\u003eReduction in redness, streaking, or swelling\u003c\/li\u003e\n\u003cli\u003eFin edges beginning to show clear, new growth (often appearing as a translucent white edge)\u003c\/li\u003e\n\u003cli\u003eUlcers beginning to close or showing clean wound margins\u003c\/li\u003e\n\u003cli\u003eNormal gill movement and breathing rate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Consult an Aquatic Veterinarian\u003c\/h3\u003e\n\u003cp\u003eSeek professional veterinary guidance if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo improvement after five days of correct dosing\u003c\/li\u003e\n\u003cli\u003eThe fish's condition worsens despite treatment\u003c\/li\u003e\n\u003cli\u003eMultiple fish are affected simultaneously, suggesting an environmental problem\u003c\/li\u003e\n\u003cli\u003eYou are unsure whether the infection is bacterial, fungal, or parasitic\u003c\/li\u003e\n\u003cli\u003eThe fish has a chronic or recurring condition that does not respond to standard antibiotic therapy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eResources like the \u003ca href=\"https:\/\/www.avma.org\/resources-tools\/find-veterinarian\" rel=\"noopener\" target=\"_blank\"\u003eAmerican Veterinary Medical Association (AVMA)\u003c\/a\u003e directory and the World Aquatic Veterinary Medical Association (WAVMA) can help you locate a qualified aquatic veterinarian in your area.\u003c\/p\u003e\n\u003c!-- BRANDS --\u003e\n\u003ch2 id=\"brands\"\u003eBrand Spotlight: Trusted Fish Mox Manufacturers\u003c\/h2\u003e\n\u003cp\u003eNot all fish antibiotics are created equal. Product quality, capsule consistency, and verifiable active ingredient content matter. Here are the brands with the strongest reputations in the industry.\u003c\/p\u003e\n\u003ch3\u003eThomas Labs (Legacy)\u003c\/h3\u003e\n\u003cp\u003eThomas Labs established the Fish Mox, Fish Flex, and Fish Flox brand names that became industry standards. While the company has since ceased production, its products set the benchmark for quality in ornamental fish antibiotics.\u003c\/p\u003e\n\u003ch3\u003eAqua Soma Labs (Fix Mox)\u003c\/h3\u003e\n\u003cp\u003eAqua Soma Labs manufactures the Fix Mox line, which contains the same active ingredient (amoxicillin) at the same dosage strengths as the original Thomas Labs products. Distributed by Fine PetHealth Group, Fix Mox has quickly become one of the most popular replacement products on the market.\u003c\/p\u003e\n\u003ch3\u003eQuality Indicators to Look For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUSP-grade (United States Pharmacopeia) ingredients\u003c\/li\u003e\n\u003cli\u003eClearly labeled active ingredient and concentration on the product packaging\u003c\/li\u003e\n\u003cli\u003eVerifiable manufacturer or distributor contact information\u003c\/li\u003e\n\u003cli\u003eFresh expiration dates with proper lot tracking\u003c\/li\u003e\n\u003cli\u003ePharmaceutical-grade manufacturing practices\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- REGULATIONS --\u003e\n\u003ch2 id=\"regulations\"\u003eRegulations and Legal Considerations\u003c\/h2\u003e\n\u003cp\u003eIn the United States, antibiotics marketed for ornamental (non-food-producing) fish occupy a unique regulatory space. They are sold over-the-counter without a prescription, as they fall outside the direct purview of both the FDA Center for Veterinary Medicine and the USDA for non-food animals. This means hobbyists can legally purchase products like Fish Mox without a veterinary prescription.\u003c\/p\u003e\n\u003cp\u003eHowever, this regulatory gap has drawn attention from public health researchers concerned about antibiotic resistance. Responsible use β€” including correct diagnosis, proper dosing, and completing full treatment courses β€” is essential to preserving the effectiveness of these medications for the animals that need them.\u003c\/p\u003e\n\u003cp\u003eRegulations vary by country. In the European Union, Australia, and Canada, access to veterinary antibiotics is generally more restricted, and a veterinary prescription may be required. Always verify your local regulations before purchasing or importing fish antibiotics.\u003c\/p\u003e\n\u003c!-- FAQ --\u003e\n\u003ch2 id=\"faq\"\u003eFrequently Asked Questions About Fish Mox\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat is the correct dosage of Fish Mox amoxicillin for a 20-gallon tank?\u003c\/h3\u003e\n\u003cp\u003eDissolve one 500 mg capsule (or two 250 mg capsules) per 20 gallons of actual water volume. Repeat every 24 hours for 5 to 10 days, performing a 20–25% water change before each new dose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs Fish Mox safe for freshwater and saltwater aquariums?\u003c\/h3\u003e\n\u003cp\u003eYes. Fish Mox dissolves effectively in both freshwater and saltwater. However, in saltwater systems containing corals or invertebrates, always treat affected fish in a separate hospital tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I use Fish Mox for fin rot?\u003c\/h3\u003e\n\u003cp\u003eFin rot is one of the most common conditions successfully treated with Fish Mox. Begin treatment as soon as you notice fraying or white edges on the fins, and continue for the full recommended course.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill Fish Mox harm my aquarium's beneficial bacteria?\u003c\/h3\u003e\n\u003cp\u003eAmoxicillin may partially affect nitrifying bacteria, potentially causing a temporary spike in ammonia or nitrite. Monitor water parameters daily during treatment and supplement with bottled nitrifying bacteria if needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between Fish Mox and Fish Mox Forte?\u003c\/h3\u003e\n\u003cp\u003eFish Mox typically refers to the 250 mg capsule strength, while Fish Mox Forte refers to the 500 mg capsule. The active ingredient (amoxicillin) is identical β€” the only difference is dosage per capsule.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan Fish Mox be used with invertebrates like shrimp or snails?\u003c\/h3\u003e\n\u003cp\u003eFish Mox is not formulated or tested for invertebrates. Shrimp, snails, crabs, and corals may be adversely affected. Treat fish in a dedicated hospital tank to protect sensitive species.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow should I prepare my aquarium before using Fish Mox?\u003c\/h3\u003e\n\u003cp\u003eRemove activated carbon filters, turn off UV sterilizers, and perform a 20–25% water change. Set up a hospital tank if possible. Ensure water parameters (ammonia, nitrite, pH, temperature) are stable before beginning treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat should I do if Fish Mox does not improve my fish's condition?\u003c\/h3\u003e\n\u003cp\u003eIf no improvement is observed after five days of correct dosing, discontinue treatment and consult an aquatic veterinarian. The infection may require a different antibiotic such as ciprofloxacin (Fish Flox) or cephalexin (Fish Flex), or the underlying issue may not be bacterial.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I combine Fish Mox with other fish medications?\u003c\/h3\u003e\n\u003cp\u003eAvoid combining Fish Mox with other antibiotics unless directed by a veterinarian. It is generally compatible with aquarium salt and standard water conditioners. Never combine antibiotics with anti-parasitic or anti-fungal treatments simultaneously.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhere can I buy Fish Mox without a prescription?\u003c\/h3\u003e\n\u003cp\u003eFish Mox and its equivalents (such as Fix Mox) are available over-the-counter from reputable aquatic health retailers online. No prescription is required in the United States for ornamental fish antibiotics. Always purchase from trusted sources that provide fresh stock with clear labeling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs Fish Mox the same as human amoxicillin?\u003c\/h3\u003e\n\u003cp\u003eWhile the active ingredient is the same compound, Fish Mox is manufactured, labeled, and sold exclusively for ornamental fish use. It is not approved for human consumption. Always use medications only as directed on their label.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- CONCLUSION --\u003e\n\u003ch2 id=\"conclusion\"\u003eConclusion\u003c\/h2\u003e\n\u003cp\u003eFish Mox remains the gold standard among aquarium antibiotics for good reason: it is effective, widely available, easy to administer, and backed by decades of use in the fishkeeping community. When used responsibly β€” with proper diagnosis, correct dosing, full treatment courses, and appropriate tank preparation β€” it provides ornamental fish with the best possible chance of recovering from bacterial infections.\u003c\/p\u003e\n\u003cp\u003eRemember: antibiotics are a powerful tool, but they are not a substitute for good aquarium husbandry. Maintain excellent water quality, quarantine new arrivals, avoid overstocking, and feed a nutritious diet to keep your fish's immune systems strong. When bacterial disease does strike, Fish Mox is the reliable partner you want in your fishkeeping toolkit.\u003c\/p\u003e\n\u003c!-- RESOURCES --\u003e\n\u003cdiv class=\"resources\" id=\"resources\"\u003e\n\u003ch2\u003eRecommended Resources\u003c\/h2\u003e\n\u003ch3\u003eInternal Links\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"#\"\u003eFish Flex (Cephalexin) Capsules – Targeted Treatment for Gram-Positive Fish Infections\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#\"\u003eFish Flox (Ciprofloxacin) – Powerful Broad-Spectrum Antibiotic for Aquarium Fish\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#\"\u003eComplete Guide to Setting Up a Quarantine Tank for Sick Fish\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eExternal Resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.avma.org\/resources-tools\/find-veterinarian\" rel=\"noopener\" target=\"_blank\"\u003eAmerican Veterinary Medical Association (AVMA) – Find a Veterinarian\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.merckvetmanual.com\/exotic-and-laboratory-animals\/fish\" rel=\"noopener\" target=\"_blank\"\u003eMerck Veterinary Manual – Bacterial Diseases of Fish\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.fda.gov\/animal-veterinary\" rel=\"noopener\" target=\"_blank\"\u003eFDA Center for Veterinary Medicine\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c!-- ════════ FOOTER DISCLAIMER ════════ --\u003e\n\u003cdiv class=\"footer-disc\"\u003e\n\u003cstrong\u003eDisclaimer:\u003c\/strong\u003e This article is for educational purposes only and does not constitute veterinary advice. Fish Mox and all products discussed are intended exclusively for use in ornamental and aquarium fish. They are not for human consumption or for use in food-producing animals. Consult a qualified aquatic veterinarian for diagnosis and treatment recommendations.\u003c\/div\u003e","brand":"Fish Mox Supply","offers":[{"title":"(250mg) - 100 Count","offer_id":50531779838195,"sku":"FMF-250-100","price":30.99,"currency_code":"USD","in_stock":true},{"title":"(250mg) - 30 Count","offer_id":50531779870963,"sku":"FMF-250-30","price":25.99,"currency_code":"USD","in_stock":true},{"title":"(500mg) - 100 Count","offer_id":50531779903731,"sku":"FMF-500-100","price":39.99,"currency_code":"USD","in_stock":true},{"title":"(500mg) - 30 Count","offer_id":50531779936499,"sku":"FMF-500-30","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-mox-amoxicillin-250mg-capsules-100-count-fish-antibioti.webp?v=1787674547"},{"product_id":"fish-pen-penicillin-tablets-fish-antibiotics-500-mg","title":"Fish Pen (Penicillin) Tablets Fish Antibiotics, 500-mg","description":"\u003ch2\u003e\u003cstrong\u003eEliminate Harmful Bacteria Quickly in Aquariums\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFish Pen 500 (Penicillin) Fish Medication\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eis a powerful antibiotic designed to protect your fish from bacterial infections. This medicine works on the main types of bacteria that make fish sick, like flexibacter, fin rot, and tail rot. It keeps your fish healthy, helps them recover faster, and comes from the USA with no fillers or extras.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eImportant Notice:\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThis product isΒ \u003cstrong\u003eintended for fish use only\u003c\/strong\u003e. It isΒ \u003cstrong\u003enot for human consumption\u003c\/strong\u003e. We do not sell or recommend this product for human use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Infection Control\u003c\/strong\u003e: Rapidly combats common bacterial infections in fish, ensuring healthier aquatic environments and preventing disease spread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted Bacteria Elimination\u003c\/strong\u003e: Specifically treats gram-positive and some gram-negative bacteria affecting fish, maintaining tank balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects Fish Health\u003c\/strong\u003e: Helps recover from flexibacter, fin rot, and tail rot infections efficiently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe and Pure Formula\u003c\/strong\u003e: Contains no fillers or additives, ensuring only the active medication affects fish health.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Quality\u003c\/strong\u003e: Manufactured in the USA with strict standards, delivering a dependable antibiotic solution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eVariants\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAvailable in two sizes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e30 count\u003c\/li\u003e\n\u003cli\u003e60 count\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIngredients\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cdiv class=\"table-container\"\u003e\n\u003ctable height=\"83\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003e\u003cstrong\u003eActive Ingredient (per tablet)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"76\"\u003e\n\u003cp\u003e\u003cstrong\u003eAmount\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePenicillin\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"76\"\u003e\n\u003cp\u003e500 mg\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eDirections for UseΒ \u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDosage\u003c\/strong\u003e: Add one 500mg tablet for every 20 gallons of aquarium water to treat bacteria effectively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeat Treatment\u003c\/strong\u003e: Repeat the same dosage 24 hours later to make sure bacteria are fully controlled.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Change\u003c\/strong\u003e: Do a partial water change between treatments to keep the water clean and safe for fish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment Duration\u003c\/strong\u003e: Continue treatment for at least five days, but no longer than ten days, depending on infection severity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitor Improvement\u003c\/strong\u003e: Watch your fish carefully; if there’s no improvement after five days, stop treatment to avoid overmedicating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdditional Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003ePrecautions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper Storage\u003c\/strong\u003e: Keep the container tightly closed, storing in a cool, dry place away from moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for Human Consumption\u003c\/strong\u003e: Do not give this medication to fish intended for human consumption under any circumstances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverdose Warning\u003c\/strong\u003e: In case of accidental overdose, immediately contact a qualified health professional for proper guidance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping \u0026amp; Return\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWe offer ground, express, priority, and international delivery; see our\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/hardypaw.com\/pages\/shipping-policies\" title=\"Shipping policy\" aria-label=\"Shipping policy\"\u003eshipping policy\u003c\/a\u003e\u003cspan\u003eΒ \u003c\/span\u003efor details.\u003c\/p\u003e\n\u003cp\u003eFor return instructions or product concerns, please refer to our detailed\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/hardypaw.com\/policies\/refund-policy\" title=\"Refund policy\" aria-label=\"Refund policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eQ1: How does Fish Pen 500 (Penicillin) fish medication help treat bacterial infections in aquariums?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Pen 500 (Penicillin) fish antibiotic targets gram-positive and some gram-negative bacteria. This medication helps prevent common diseases like flexibacter infections, fin rot, and tail rot. Its pure formula contains no fillers and is safe for all aquarium species.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ2: Can I use Fish Pen 500 (Penicillin) tablets for all types of fish in my tank?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Pen 500 tablets are perfect for keeping your freshwater fish healthy. They fight harmful bacteria and help your fish bounce back from fin rot, tail rot, and flexibacter infections when used properly.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ3: What is the correct way to dose Fish Pen 500 (Penicillin) for aquarium treatment?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eAdd one 500mg tablet of Fish Pen 500 per 20 gallons of aquarium water. Repeat the dose after 24 hours. Make partial water changes between treatments. Duration depends on infection severity, but continue at least five days, up to ten.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ4: How long should I continue Fish Pen 500 (Penicillin) treatment for my sick fish?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Pen 500 treatment should continue for a minimum of five days, depending on infection. Do not exceed ten days of use. Monitor your fish daily while using Fish Pen 500. Discontinue treatment if no improvement is observed after five days to prevent unnecessary exposure.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ5: Is Fish Pen 500 (Penicillin) safe for use in aquariums with edible fish?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Pen 500 (Penicillin) is strictly for aquarium fish, not for human consumption. Do not give it to fish intended for eating. Use Fish Pen 500 only in ornamental aquariums.\u003c\/p\u003e","brand":"Fish Mox Supply","offers":[{"title":"30 Count","offer_id":50531779641587,"sku":"FP-500-30","price":63.99,"currency_code":"USD","in_stock":true},{"title":"60 Count","offer_id":50531779674355,"sku":"FP-500-60","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-pen-penicillin-500mg-tablets-30-count-fish-antibiotic.webp?v=1787674546"},{"product_id":"fish-zole-metronidazole-tablets-fish-antibiotics","title":"Fish Zole (Metronidazole) Tablets Fish Antibiotics","description":"\u003ch2\u003e\u003cstrong\u003eEliminate Bacterial Threats Quickly and Effectively\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFish Zole (Metronidazole)\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eis a powerful antibiotic designed to combat anaerobic and gram-positive bacteria efficiently. It fights tough bacterial infections like mycobacterial, aeromonas, and pseudomonas, keeping your fish healthy and active. Made in the USA without any fillers or additives, it provides a safe and reliable way to handle common aquarium infections.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eImportant Notice:\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThis product isΒ \u003cstrong\u003eintended for fish use only\u003c\/strong\u003e. It isΒ \u003cstrong\u003enot for human consumption\u003c\/strong\u003e. We do not sell or recommend this product for human use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Infection Control:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eEffectively eliminates anaerobic and gram-positive bacteria to prevent disease progression in aquatic life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad-Spectrum Efficacy:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eControls multiple bacterial infections including mycobacterial, aeromonas, and pseudomonas with consistent results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Healthy Recovery:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eHelps your fish heal faster from bacterial issues, while keeping stress low and comfort better.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Treatment:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eWorks well for common infections, giving steady results and making fish care more simple.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eVariants\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAvailable in two sizes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e250 mg: 60 count\u003c\/li\u003e\n\u003cli\u003e500 mg: 60 count\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIngredients\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cdiv class=\"table-container\"\u003e\n\u003ctable height=\"83\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"230\"\u003e\n\u003cp\u003e\u003cstrong\u003eActive Ingredients (per tablet)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"82\"\u003e\n\u003cp\u003e\u003cstrong\u003eAmount\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"230\"\u003e\n\u003cp\u003eMetronidazole\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"82\"\u003e\n\u003cp\u003e250 mg\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eDirections for UseΒ \u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDosage Administration\u003c\/strong\u003e: Add one 250mg tablet per ten gallons of water to treat the aquarium effectively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeat Treatment\u003c\/strong\u003e: Repeat the dosage 24 hours after initial treatment to ensure proper bacterial infection control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Management\u003c\/strong\u003e: Make a partial water change between treatments to maintain healthy and stable aquarium conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment Duration\u003c\/strong\u003e: Continue medication baths for at least five days, adjusting up to ten days if necessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitoring Effectivenes\u003c\/strong\u003es: Discontinue treatment if no improvement occurs after five days to prevent overmedication or stress.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdditional Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003ePrecautions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper Storage:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eKeep the container closed and store it in a cool, dry place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended Use:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eUse it only for aquariums, and keep it away from people to avoid misuse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsumption Warning:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eDon’t use this for fish that are meant to be eaten at any time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverdose Response:\u003cspan\u003eΒ \u003c\/span\u003e\u003c\/strong\u003eIf too much gets used by mistake, contact a health professional right away.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping \u0026amp; Return\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWe offer ground, express, priority, and international delivery; see our\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/hardypaw.com\/pages\/shipping-policy\" title=\"Shipping policy | hardypaw\" aria-label=\"Shipping policy | hardypaw\"\u003eshipping policy\u003c\/a\u003e\u003cspan\u003eΒ \u003c\/span\u003efor details.\u003c\/p\u003e\n\u003cp\u003eFor return instructions or product concerns, please refer to our detailed\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/hardypaw.com\/policies\/refund-policy\" title=\"Refund policy\" aria-label=\"Refund policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eQ1: How does Fish Zole help treat bacterial infections in fish?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Zole is an effective Metronidazole antibiotic for fish. It works well against tough bacteria like anaerobic and gram-positive types, including issues caused by mycobacteria, aeromonas, and pseudomonas. Using it the right way and on time helps your fish bounce back quicker, keeps their stress low, and supports overall health.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ2: Can Fish Zole treat multiple types of bacterial infections in aquariums?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Zole provides broad-spectrum bacterial control. It helps fight off gram-positive and anaerobic bacteria, including common issues like aeromonas and pseudomonas. Using the right dose really makes a difference, it helps your fish recover smoothly, stops problems from getting worse, and keeps your tank stable.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ3: What is the recommended way to use Fish Zole tablets in an aquarium?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eUse one Fish Zole tablet for every ten gallons of water. After 24 hours, add the next dose, and do a partial water change in between to keep things clean and balanced. Keep this going for about five to ten days, depending on how serious the infection is.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ4: Is Fish Zole safe for fish and free from additives?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Zole, formulated with pure Metronidazole, contains no fillers or additives. Made in the USA, it’s built to be safe and dependable, so you can use it with confidence. It helps manage bacterial infections while keeping things calm for your fish, making recovery smoother and less stressful.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ5: What precautions should be followed when using and storing Fish Zole?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eKeep Fish Zole in a cool, dry spot and make sure the lid is always tightly closed so it stays effective. This product is meant only for aquarium use, don’t use it for yourself or for fish that are going to be eaten.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ6: How long should I treat my fish with Fish Zole?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eTreatment with Fish Zole should last at least five days, up to ten days if needed. Monitor fish closely and discontinue if no improvement occurs after five days to prevent overmedication or stress.\u003c\/p\u003e","brand":"Fish Mox Supply","offers":[{"title":"250-mg (100-count)","offer_id":50531780133107,"sku":"FZ-250-100","price":41.99,"currency_code":"USD","in_stock":true},{"title":"500-mg (100-count)","offer_id":50531780165875,"sku":"FZ-500-100","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-zole-metronidazole-500mg-100ct-back.webp?v=1787674553"},{"product_id":"fish-clin-150-100-capsules","title":"Fish Clin 150 - 100 Capsules","description":"\u003cp\u003eWe want to notify you that due to manufacturing changes, the product label you receive may not exactly match the one shown on our website. However, please be assured that the product's quality, ingredients, and benefits remain unchanged. Additionally, all our products are FDA approved, ensuring the highest standards of safety and quality.\u003c\/p\u003e\n\u003cp\u003eFish Clin 150 - 100 Capsules\u003c\/p\u003e","brand":"Fish Mox Supply","offers":[{"title":"Default Title","offer_id":50531780198643,"sku":"FC-150-100","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-clin-clindamycin-150mg-100ct-front.webp?v=1787674552"},{"product_id":"fish-flox-ciprofloxacin-tablets-fish-antibiotics-500-mg","title":"Fish Flox (Ciprofloxacin) Tablets Fish Antibiotics, 500-mg","description":"\u003cdiv id=\"shopify-section-template--19184439296161__description\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"template--19184439296161__description\" data-section-type=\"tabbed\" data-carousel-type=\"section\" data-url=\"\/\/fishmoxsupply.com\/cdn\/shop\/t\/151\/assets\/script.tabbed.js?v=83467205078527531921768939043\" class=\"loaded ignore\"\u003e\n\u003cdiv class=\"container half-pad clearFISH\"\u003e\n\u003cdiv class=\"dynamic-section dynamic-section-template--19184439296161__description section-padding-top section-padding-bottom section-margin-bottom section-border\"\u003e\n\u003cdiv class=\"product-description nine center text-left clearFISH\"\u003e\n\u003cdiv id=\"text-text_86CD3i\" class=\"tab-body tab-body-content tab-body-id-template--19184439296161__description\"\u003e\n\u003cdiv class=\"tabindex table-scroll\"\u003e\n\u003ch2\u003e\u003cstrong\u003ePromote Rapid Recovery in Aquarium Fish Health\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFish Flox 500 (Ciprofloxacin) 500mg\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eis a potent, broad-spectrum antibiotic designed to restore your ornamental and aquarium fish to full health. Targeting harmful gram-negative bacteria like Vibrio, Flexibacter, and Aeromonas, it also combats select gram-positive pathogens. This precise formulation helps treat fin rot, gill disease, body ulcers, and systemic infections efficiently, supporting faster healing and healthier, active fish.\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eImportant Notice:\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThis product isΒ \u003cstrong\u003eintended for fish use only\u003c\/strong\u003e. It isΒ \u003cstrong\u003enot for human consumption\u003c\/strong\u003e. We do not sell or recommend this product for human use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Infection Protection:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eHelps get rid of harmful bacteria, both gram-negative and some gram-positive, keeping fish healthier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaster Healing and Recovery:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eSupports quick repair of fin rot, gill damage, ulcers, and other internal infections in fish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargets Dangerous Germs:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eWorks against Vibrio, Flexibacter, and Aeromonas, common bacteria that can harm aquarium and ornamental fish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe and Pure Formula:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFree from fillers, binders, or unnecessary additives, ensuring fish safety and optimal results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Quality Assurance:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eProudly made in the USA, guaranteeing consistency, reliability, and high-quality antibiotic treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eVariants\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAvailable in two sizes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e30 count\u003c\/li\u003e\n\u003cli\u003e60 count\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIngredients\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eActive Ingredient\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cdiv class=\"table-container\"\u003e\n\u003ctable height=\"84\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"261\"\u003e\n\u003cp\u003e\u003cstrong\u003eActive Ingredients (per capsule)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"86\"\u003e\n\u003cp\u003e\u003cstrong\u003eStrength\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"261\"\u003e\n\u003cp\u003eCiprofloxacin\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"86\"\u003e\n\u003cp\u003e500 mg\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eDirections for UseΒ \u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDosage\u003c\/strong\u003e: Add one 500 mg Fish Flox 500 tablet per two gallons of water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeat Treatment\u003c\/strong\u003e: Administer the treatment again after 24 hours for consistent infection control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Maintenance\u003c\/strong\u003e: Perform partial water changes daily to keep the tank water clean and healthy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment Duration\u003c\/strong\u003e: Continue giving medication for five to seven days depending on how severe infection is.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVeterinarian Advice\u003c\/strong\u003e: If fish show no improvement within five days, stop treatment and consult aquatic veterinarian.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAdditional Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003ePrecautions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Instructions\u003c\/strong\u003e: Store sealed in a cool place away from sunlight or moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep Away from Children\u003c\/strong\u003e: Always keep this medication out of reach of children, pets, and other animals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Use Only\u003c\/strong\u003e: This product is strictly for aquarium fish and not for human consumption.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid Human Consumption\u003c\/strong\u003e: Do not use fish treated with this antibiotic for human consumption under any circumstances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Safely\u003c\/strong\u003e: Use only as directed and avoid direct contact with skin, eyes, or accidental ingestion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeek Medical Advice if Exposed\u003c\/strong\u003e: In case of accidental overdose or exposure, contact a medical professional immediately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eShipping \u0026amp; Return\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWe offer ground, express, priority, and international delivery; see our\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/fishmoxsupply.com\/pages\/shipping-policy\" title=\"Shipping policy | hardypaw\" aria-label=\"Shipping policy | hardypaw\"\u003eshipping policy\u003c\/a\u003e\u003cspan\u003eΒ \u003c\/span\u003efor details.\u003c\/p\u003e\n\u003cp\u003eFor return instructions or product concerns, please refer to our detailed\u003cspan\u003eΒ \u003c\/span\u003e\u003ca href=\"https:\/\/fishmoxsupply.com\/policies\/refund-policy\" title=\"Refund policy\" aria-label=\"Refund policy\"\u003erefund policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eQ1: How does Fish Flox 500 help my aquarium fish recover from infections?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Flox 500 fights harmful bacteria like Vibrio, Flexibacter, and Aeromonas, helping your fish heal from fin rot, gill damage, body sores, and other infections, so they can swim strong and stay healthy again.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ2: What is the proper dosage for Fish Flox 500 in a quarantine or hospital tank?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eAdd one 500 mg tablet of Fish Flox 500 per two gallons of water. Repeat after 24 hours and perform daily partial water changes to maintain water quality for optimal bacterial infection control.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ3: Is Fish Flox 500 safe for all ornamental and aquarium fish species?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Flox 500 is formulated for most ornamental and aquarium fish. It is free from fillers and unnecessary additives, helping to ensure safe treatment while effectively combating bacterial infections and supporting faster recovery.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ4: How long should Fish Flox 500 treatment be continued for infected fish?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eThe treatment with Fish Flox 500 should continue for five to seven days, depending on infection severity. If no improvement occurs within five days, discontinue use and consult an aquatic veterinarian for advice.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eQ5: Can Fish Flox 500 be used for human consumption or fish intended for food?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAns:\u003c\/strong\u003e\u003cspan\u003eΒ \u003c\/span\u003eFish Flox 500 is strictly for aquarium and ornamental fish. It should never be used for human consumption or fish intended for eating, as it is specifically formulated to treat bacterial infections in fish only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"shopify-section-template--19184439296161__1769530276abd9b6fc\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"template--19184439296161__1769530276abd9b6fc\" data-section-type=\"html\" class=\"dynamic-section dynamic-section-template--19184439296161__1769530276abd9b6fc section-padding-top section-padding-bottom section-margin-bottom section-border clearFISH loaded\"\u003e\n\u003cdiv class=\"container inner-container clearFISH\"\u003e\n\u003cdiv id=\"shopify-block-AOFdaZCtEVDltMkYrU__rebuy_personalization_engine_rebuy_widget_pmqgEK\" class=\"shopify-block shopify-app-block\"\u003e\n\u003cdiv data-rebuy-id=\"227036\" data-rebuy-shopify-product-ids=\"8184898977953\" data-initialized=\"true\"\u003e\n\u003cdiv id=\"rebuy-widget-227036\" class=\"rebuy-widget widget-type-dynamic-bundle is-visible\"\u003e\n\u003cdiv class=\"rebuy-widget-container widget-display-embed is-visible\"\u003e\n\u003cdiv class=\"rebuy-widget-content\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Fish Mox Supply","offers":[{"title":"30 Count","offer_id":50531780231411,"sku":"FF-500-30","price":59.99,"currency_code":"USD","in_stock":true},{"title":"60 Count","offer_id":50531780264179,"sku":"FF-500-60","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/files\/fish-flox-ciprofloxacin-500mg-30ct-front.webp?v=1787674553"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0807\/5152\/6131\/collections\/fish-mox-amoxicillin-250mg-capsules-100-count-fish-antibioti.webp?v=1789399352","url":"https:\/\/theshoppingcenter.store\/collections\/fish-aquarium-care.oembed","provider":"The Shopping Center","version":"1.0","type":"link"}