Collection: Fish Antibiotics

All of the medicines we carry are NON-PRESCRIPTION fish antibiotics. They are USP grade antibiotics produced by pharmaceutical companies. The Dosages and Strengths and medications are for use in ornamental or pet fish only.
Fish MoxFish FlexFish ZoleFish  Flox,  

"All Thomas Labs fish antibiotics have high potency and contain pharmaceutical grade quality ingredients."

WHAT DOES PHARMACEUTICAL GRADE FISH ANTIBIOTICS MEAN? (USP)

"Pharmaceutical Grade is the highest quality substance used, products meeting this grade must be greater than 99% pure, and cannot contain binders, fillers, excipients, dyes or unknown substances." (source: Thomas Labs Product Catalog)

Types of Fish Antibiotics - For More Information Click on Each Type or Read " About Fish Antibiotics "

Fish Antibiotics in tablets or capsules

Fish Antibiotics in raw pure powder form

Fish Antibiotic Powder in single dose packets

Fast, FREE Shipping! Order before 2 p.m. and it ships today 

(see full shipping policy for details- orders placed before 4 p.m. Eastern Monday-Friday ship the same business day. If orders are placed on Saturdays/Sundays they will ship the next business day)

72 products
  • Fish Mox Forte - Amoxicillin 500 mg Capsules (100 Count)
    fish mox 500mg fish antibiotics by thomas labs
    Regular price
    $39.95
    Sale price
    $39.95
    Regular price
    $49.95
    Unit price
    per 
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  • Fish Cin - Clindamycin 150 mg Capsules (100 Count)
    thomas labs Fish Cin - Clindamycin 150 mg fish antibiotics
    Regular price
    $79.95
    Sale price
    $79.95
    Regular price
    $119.95
    Unit price
    per 
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  • Fish Mox - Amoxicillin 250 mg Capsules (30 Count)
    thomas labs fish mox 250 mg antibiotics for fish
    Regular price
    $19.95
    Sale price
    $19.95
    Regular price
    $29.95
    Unit price
    per 
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  • Fish Zole - Metronidazole 250 mg Tablets (30 Count)
    Fish Zole - Metronidazole 250 mg Tablets (30 Count)
    Regular price
    $49.95
    Sale price
    $49.95
    Regular price
    $79.95
    Unit price
    per 
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  • Fish Zole Forte - Metronidazole 500 mg Tablets (100 Count)
    Fish Zole Forte - Metronidazole 500 mg Tablets (100 Count)
    Regular price
    $149.95
    Sale price
    $149.95
    Regular price
    $195.95
    Unit price
    per 
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  • Fish Flex - Cephalexin/Keflex 250 mg Capsules (30 Count)
    Fish Flex - Cephalexin/Keflex 250 mg Capsules (30 Count)
    Regular price
    $25.95
    Sale price
    $25.95
    Regular price
    $39.95
    Unit price
    per 
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  • Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (30 Count)
    Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (30 Count)
    Regular price
    $39.95
    Sale price
    $39.95
    Regular price
    $59.95
    Unit price
    per 
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  • Fish Pen - Penicillin 250 mg Tablets (100 Count)
    Fish Pen - Penicillin 250 mg Tablets (100 Count)
    Regular price
    $45.95
    Sale price
    $45.95
    Regular price
    $69.95
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  • Fish Mox Forte - Amoxicillin 500 mg Capsules (30 Count)
    fish mox 500 mg fish antibiotics by thomas labs
    Regular price
    $25.95
    Sale price
    $25.95
    Regular price
    $39.95
    Unit price
    per 
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  • Fish Mox Forte - Amoxicillin 500 mg Capsules (100 Count) - 3 Pack
    fish mox 500mg fish antibiotics by thomas labs
    Regular price
    $115.95
    Sale price
    $115.95
    Regular price
    $149.95
    Unit price
    per 
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  • Fish Mox - Amoxicillin 250 mg Capsules (100 Count)
    thomas labs fish mox 250 mg antibiotics for fish
    Regular price
    $25.95
    Sale price
    $25.95
    Regular price
    $39.95
    Unit price
    per 
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  • Fish Zole - Metronidazole 250 mg Tablets (100 Count)
    Fish Zole - Metronidazole 250 mg  antibiotics for fish by thomas labs
    Regular price
    $95.95
    Sale price
    $95.95
    Regular price
    $125.95
    Unit price
    per 
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  • Fish Flox Forte - Ciprofloxacin 500 mg Tablets (12 Count)
    Fish Flox Forte - Ciprofloxacin 500 mg Tablets (12 Count)
    Regular price
    $35.95
    Sale price
    $35.95
    Regular price
    $55.95
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  • Fish Pen Forte - Penicillin 500 mg Tablets (100 Count)
    fish penicillin antibiotics for fish by thomas labs
    Regular price
    $69.95
    Sale price
    $69.95
    Regular price
    $89.95
    Unit price
    per 
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  • Fish Cin - Clindamycin 150 mg Capsules (30 Count)
    Fish Cin - Clindamycin 150 mg Capsules (30 Count)
    Regular price
    $39.95
    Sale price
    $39.95
    Regular price
    $59.95
    Unit price
    per 
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  • Fish Sulfa Forte - Sulfamethoxazole 800 mg, Trimethoprim 160 mg Tablets (30 Count)
    fish sulfa forte antibiotics for fish by thomas labs
    Regular price
    $34.95
    Sale price
    $34.95
    Regular price
    $59.95
    Unit price
    per 
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  • Fish Doxy - Doxycycline 100 mg Tablets (30 Count)
    fish doxycycline fish antibiotics by thomas labs
    Regular price
    $99.95
    Sale price
    $99.95
    Regular price
    $139.95
    Unit price
    per 
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  • Fish Min - Minocycline hyclate 50 mg Capsules (12 Count)
    Fish Min - Minocycline Hyclate 50 mg Capsules (12 Count)
    Regular price
    $35.95
    Sale price
    $35.95
    Regular price
    $49.95
    Unit price
    per 
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  • Fish Mox Forte - Amoxicillin 500 mg Capsules (12 Count)
    Fish Mox Forte - Amoxicillin 500 mg Capsules (12 Count)
    Regular price
    $23.95
    Sale price
    $23.95
    Regular price
    $29.95
    Unit price
    per 
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  • Fish Mox Forte - Amoxicillin 500 mg Capsules (100 Count) - 2 Pack
    fish mox 500 mg fish antibiotics by thomas labs
    Regular price
    $77.95
    Sale price
    $77.95
    Regular price
    $99.95
    Unit price
    per 
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  • Fish Mox - Amoxicillin 250 mg Capsules (100 Count) - 3 Pack
    thomas labs fish mox 250 mg antibiotics for fish
    Regular price
    $74.95
    Sale price
    $74.95
    Regular price
    $119.95
    Unit price
    per 
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  • Fish Flex - Cephalexin/Keflex 250 mg Capsules (100 Count) - 3 Pack
    Fish Flex  250  mg fish antibiotics by thomas labs
    Regular price
    $107.95
    Sale price
    $107.95
    Regular price
    $145.95
    Unit price
    per 
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  • Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (100 Count) - 3 Pack
    fish flex 500 mg fish antibiotics by thomas labs
    Regular price
    $169.95
    Sale price
    $169.95
    Regular price
    $260.00
    Unit price
    per 
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  • Aqua mox 250mg amoxicillin -100 Count
    Regular price
    $31.95
    Sale price
    $31.95
    Regular price
    $49.95
    Unit price
    per 
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  • Aqua mox 500mg amoxicillin -100 Count
    Regular price
    $35.95
    Sale price
    $35.95
    Regular price
    $49.95
    Unit price
    per 
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  • (Fish Flex Forte Equivalent) Fish Cephalexin Plus - 500 mg -30count
    Regular price
    $29.99
    Sale price
    $29.99
    Regular price
    $49.95
    Unit price
    per 
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  • (Fish Pen Equivalent) Fish Penicillin - 250 mg - 100 count
    Regular price
    $45.95
    Sale price
    $45.95
    Regular price
    $79.95
    Unit price
    per 
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  • Fish Zole Forte - Metronidazole 500 mg Powder Packets (12 Count)
    Fish Zole Forte - Metronidazole 500 mg Powder Packets (12 Count)
    Regular price
    $26.95
    Sale price
    $26.95
    Regular price
    $39.95
    Unit price
    per 
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  • Fish Mox - Amoxicillin 250 mg Capsules (12 Count)
    Fish Mox - Amoxicillin 250 mg Capsules (12 Count)
    Regular price
    $14.95
    Sale price
    $14.95
    Regular price
    $24.95
    Unit price
    per 
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  • Fish Flex - Cephalexin/Keflex 250 mg Capsules (100 Count)
    Fish Flex  250  mg fish antibiotics by thomas labs
    Regular price
    $36.95
    Sale price
    $36.95
    Regular price
    $49.95
    Unit price
    per 
    Sold out
  • Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (12 Count)
    Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (12 Count)
    Regular price
    $25.95
    Sale price
    $25.95
    Regular price
    $39.95
    Unit price
    per 
    Sold out
  • Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (100 Count)
    Fish Flex Forte - Cephalexin/Keflex 500 mg Capsules (100 Count)
    Regular price
    $59.95
    Sale price
    $59.95
    Regular price
    $79.95
    Unit price
    per 
    Sold out