For a full list of the fish antibiotics we carry see our product list here

Thomas Labs makes several forms of Fish Antibiotics, including: Tablets and Capsules, pure bulk powder jars, and single use powder packets. Every antibiotic is labeled clearly for fish use only and when ordering you should take care to make sure you are choosing the right dosage and medication for your application.

Fish Antibiotics Forms and Strengths

Fish Antibiotics in tablets or capsules

The Fish Antibiotics in tablet or capsule form that we carry are  USP grade antibiotics produced by pharmaceutical companies for fish and birds. Most of the antibiotic tablet and capsules that we carry come in 250 mg or 500 mg strength and in 30 or 100 count bottles.  The Dosages and Strengths are for use in ornamental or pet fish only.

Fish Antibiotics in raw pure powder form

The  Powder Fish Antibiotics that we sell are 98-99% pure powder fish antibiotics that come in bulk jars and do not contain any fillers or carriers. Thomas Labs  antibiotic powders come in different strengths based on the type of antibiotic and each is labeled with a “per level scoop” dose amount. Pure Antibiotic Powders are helpful for dosing and administering fish antibiotics to fish tanks that are not standard size and may container smaller or larger fish than average fish tanks.  They are also useful in situations that require very specific dosing measurements.  Because they are in bulk powder form they often cost less than the same medication in pill or capsule form.  

Fish Antibiotic Powder in single dose packets

Thomas Labs has recently created an alternative fish antibiotic packaging from the typical pill or capsule form.  Because costs for antibiotics and medications are always rising some medications have unfortunately been discontinued because costs have risen too high. 

An alternative to the capsules and tablets are the single use packets of fish antibiotics.  Each single use packet contains a measured dose of antibiotic powder.  This measured powder often corresponds to the exact same amount of medication that was available in capsule or tablet form but is now in a convenient packet per does.  The single use packets can easily be added to a fish tank or mixed with fish food and you can be confident that the right amount and dosage is being applied because it has been pre measured.

Care should be taken to ensure that the correct antibiotics, in the right dosing form and the correct strength are being purchased based upon need and application.

Q. What are fish antibiotics?

A. Fish antibiotics such as Fish Mox Forte are used to treat bacterial infections in fish. The antibiotics that are used to treat fish are the same antibiotic medications used for other animals like dogs or cats but because they are for fish/birds they don't require a prescription. They are clearly labeled for fish/bird use and are not for human consumption. 

Q. If the antibiotics for fish are USP grade antibiotics why can't they be used for humans?

A. Fish antibiotics should not be used for human consumption. Humans could have life threatening allergic reactions to antibiotics or other self prescribed medications and if sick should always consult a doctor. Self medicating is dangerous and we discourage anyone buying antibiotics who intends to use them for human consumption. If you need a medication for yourself please visit a doctor. We take no responsibility in the misuse of products we sell that are made for animals and we are not veterinarians, please consult a veterinarian for the correct product to treat your fish or bird.

Q. If your fish antibiotics are labeled “not for human use” does that mean I can give them to my dog or cat, or other sick animal?

A. Thomas Labs makes antibiotics for fish & birds and those are the medications that we sell.  Fish Mox ForteFish Flex ForteFish Flox ForteFish Pen Forte,  Fish Mycin,  Fish Cin, &  Fish Zole  are some of the most popular fish antibiotics. While it is true that the antibiotics you may be prescribed at the veterinarians office may be  the same as the antibiotics we sell here for fish, it is likely that if your animal is sick enough for antibiotics then they should be under the care of a veterinarian.  Dosage, administration, and prescribing medicines for pets other than fish should be done only when consulting with a licensed Veterinarian to make sure that your pet gets the correct medication needed.  Thomas Labs makes no claim to the efficiency or application of its antibiotics in any other animal besides fish, and takes no responsibility in the misuse of its products made for fish when used in other animals or humans.

Q. Why does the price of antibiotics keep fluctuating, and why have some of the most popular antibiotics been taken off the market lately?

A. Because of the demand for antibiotics in all animals and humans, certain antibiotics will be designated to be sold to the human market first and the animal market secondary, or not at all depending on world supply. Other times a popular antibiotic may be completely removed from the market and replaced with a better, more efficient antibiotic. Antibiotic removal is usually tied to the profits of big pharmaceutical manufacturers and whether that product is viable as an efficient medication or profitable product. If an antibiotic is not selling well in the human market then there is little likelihood it will continue to be produced solely because it is still a good choice for animals. We try our best to maintain stable prices but occasionally some supply shortages and cost increases force us to change our prices or take medications out of stock.


For a full list of the fish antibiotics we carry see our product list here