Fish Antibiotics

Item #1441

$17.25 to $49.70

Fish Antibiotics

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Fish Antibiotics by Thomas Labs - Used to treat bacterial diseases of fish. Exerts an agent capable of destroying gram-positive and some gram-negative bacteria. Read More

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Fish Antibiotics by Thomas Labs

Fish Antibiotics, used to treat bacterial diseases of fish. Exerts an agent capable of destroying gram-positive and some gram-negative bacteria. Simply dissolve 1 tablet or empty contents of 1 capsule in 10 gallons of water. Repeat in 24 hours. No prescription required.

Fish Antibiotics Available:

  • Fish Mox (Amoxicillin)
  • Fish Flex (Cephalexin)
  • Fish Zole (Metronidazole)
  • Fish Cillin (Ampicillin)


View manufacturer and/or label information


  • Brand: Thomas Labs
  • Type: Antibiotics
  • Ingredient: Ampicillin,Cephalexin,Cephalexen,Amoxicillin,Metronidazole
  • Size: 100 Count,30 Count,60 Count

Reviews (5)

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  1. 5.0 out of 5 stars

    "Fish Flex 500mg Works!!!"

    Got it after finding out it was the same stuff the vet prescribes at a fraction of the cost. Jeffers believes in quality products so I wasn't concerned about the "low price meaning low quality." Love Jeffers, Love that I have this product available!

  2. 4.0 out of 5 stars

    "Metronidazole is Great, Cephalexin, not so much...probably great for fish though. ;)"

    The metronidazole is a fantastic product, and has worked to cure giardia infections. Way better than trying to fix this type of problem with fenbendazole! I would not recommend the cephalexin, as the capsules have a VERY strong odor of sulphur. This is something I haven't found present in the pill form of cephalexin I get from my vet. The Fish Flex cephalexin is 1/3 the price though, so it was hard not to try it. Unfortunately, when we really needed it, vomiting occurred regularly. As a result, for future needs, I've already ordered a larger supply from the vet at the higher price. :(

  3. 5.0 out of 5 stars

    "Emergency meds"

    I actually HAVE used these on label and these are the best quality and lowest price compared to the powders and tabs in the pet stores. But is so handy to have on hand if you know what you are doing, to start treatment when you can't get to the vet. I can't emphasize strongly enough though, that using these is merely a stopgap measure to getting professional help!

  4. 5.0 out of 5 stars

    "Fish Flex 500mg"

    More costly than I might be able to get otherwise, but my need was urgent, and Jefferspet is reliable and overnighted it, and so we staved off the infection quickly. Now I know it's available, I'll order to make sure I always have some on hand.

  5. 5.0 out of 5 stars

    "High Quality"

    Very high quality product with many uses. Would HIGHLY recommend.

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