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Fish Flex (cephalexin)

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Product Overview

How To Use

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Questions & Answers

Product Description

Fish Flex (cephalexin) is a broad spectrum antibiotic used in the treatment of a wide range of bacterial infections. It is effective against a number of pathogentic bacteria associated with ornamental fish. Available in 250 or 500 mg strengths in bottles of 30 or 100 capsules. 

What is Fish Flex (cephalexin)?

Fish Flex (cephalexin) is a broad spectrum antibiotic used in the treatment of a wide range of bacterial infections in fish.

Who is Fish Flex (cephalexin) for?


Why use Fish Flex (cephalexin)?

-Fish Flex contains Cephalexin Monohydrate -Water-soluble, broad spectrum antibiotic -Treats a wide range of non-specific bacterial infections in fish

How does Fish Flex (cephalexin) work?


Thomas Laboratories

Active ingredient(s):


How is Fish Flex (cephalexin) sold?

250 mg or 500 mg in 30 ct or 100 ct capsule bottles

What are the side effects of Fish Flex (cephalexin)?

What special precautions are there?

Keep out of reach of children. Fish Antibiotics are for aquarium use only. Intended for ornamental fish and/or ornamental organisms, and not intended for use with fish that are intended for human consumption.

What to do if overdose?

Contact your nearest emergency animal hospital

How can I store Fish Flex (cephalexin)?

Keep lid tightly fastened and store at controlled room temperature of 59°-86°F. (15°-30°C).

Helpful Tips:

Add contents of one capsule (250 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.


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