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Thomas Labs Fish Flex Forte 500mg

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Thomas Labs
RRP: $32.99
$28.73 (You save $4.26)
Usually ships within 24 hours!

 Product Description

Thomas Labs Fish Flex Forte® (Cephalexin) 500 mg

Fish Flex Forte® (Cephalexin) is a trusted fish antibiotic that fights bacterial diseases in marine and freshwater fish.  


  • Pharmaceutical-grade, but no prescription required for purchase

  • Wields a bactericidal action on gram-positive and some gram-negative bacteria

  • Broad-spectrum antibiotic for use in fish

  • Effective against a number of pathogenic bacteria

  • For use in marine and freshwater ornamental fish diseases

Thomas Labs Fish Flex Forte®cephalexin is a leading antibiotic for fish. Use these fish antibiotics to treat a number of diseases and conditions in your marine or freshwater fishy pals, especially those that could be resistant to other types of fish antibiotics. We acquire this fish medication through a pharmacist every week to ensure freshness, although you do not need a veterinarian's prescription to purchase this aquatic medication. With Fish Flex Forte, there’s no wrangling or sequestering your fish for treatment. Buy fish antibiotics, fish supplies, and more with My Hooves and Paws to keep your scaled friends healthy and happy!


  • 500mg capsules of cephalexin for fish 

  • For marine and freshwater fish


Add the contents of one Fish Flex Forte capsule (500 mg) into aquarium for each 10 gallons of water to be treated Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While treatment duration depends on type and severity of the infection, it is recommended that extended medication baths continue for a minimum of 5 days and not more than 10 days. Discontinue treatment with this medication if no improvement is noted within 5 days. To remove harmless yellow color, change 20 percent of water and use charcoal filter until clear.

*All Thomas Labs products qualify for free standard United States shipping — regardless of the quantity, no matter how much you buy. It will appear in your cart after you enter your information at checkout.

Need assistance with your order? Call us at 760-247-5523 or email us at info@myhoovesandpaws.com. We’re happy to help you with your order or answer any questions you may have! 


Fish Flex 500mg 100 Count Expiration Date:4/2022 or Later 

Fish Flex 500mg 30 Count Expiration Date:4/2021 or Later  


 Warranty Information

If you are not happy with your purchase, MyHoovesandPaws understands. We accept returns an astonishing 365 days from the date you place your order. For more details please see our returns page.

 Find Similar Products by Tag

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 Product Reviews


    Posted by Scott on Dec 3rd 2019

    I was floored by how fast this came, Cephalexin antibiotic 500 mg 100 count. The best before date was in to 2021, it came fast and I watched it work.

  2. Good product

    Posted by Unknown on Oct 10th 2019

    This is a correct medicine

  3. Best price out there!

    Posted by Kristie on Oct 12th 2018

    I've been ordering fish antibiotics here for years and still they have the lowest prices I can find. They always have deals or coupons that make it even lower at times. Shipping has always been 2 to 3 days but I live up in the mountains so that's very good I've never once had any issues with any order and I've gotten different fish antibiotics from here.
    I will continue shopping with Hooves and Paws as long as I have pets.

  4. Flex

    Posted by Jane Lubitz on Sep 18th 2018

    Great stuff!!!

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