Do they make Azithromycin as a fish antibiotic?

Azithromycin is an antibiotic. However, it is not a fish antibiotic. We receive frequent calls inquiring about this particular antibiotic. We do not carry that particular antibiotic. We can only carry fish antibiotics that we receive from our manufacturer, Thomas Laboratories. We have contacted Thomas Labs ourselves to ask about this product because of the obvious demand from our customers. We have decided to write this blog to explain the answer we received from Thomas Labs.

We were told over a phone conversation that Azithromycin is a strong antibiotic. So strong that they have decided, and when I say they I don’t really know who they are but “they” are the individuals who have the power to make decisions about which antibiotics can be produced and sold for animals, to not allow Azithromycin to be sold as a fish antibiotics or pet antibiotic.

All of our fish antibiotics are not to be taken by humans, you can read more about that in our blog post Can Humans Take Thomas Labs’ Fish Antibioticsand therefore, “they” have decided that this strong antibiotic will be made and produce solely for human use. Therefore, we as a retailer for fish antibiotics and bird antibiotics will not be carrying Azithromycin.

We do have a wide assortment of pet antibiotics that you can purchase for your pets. Here are a few of our most popular items.

Fish Mox (Amoxicillin)

Fish Pen (Penicillin)

Fish Flex (Cephalexin/Keflex)

Bird Biotic (Doxycycline)

Tagged with: , ,

Can Humans Take Thomas Labs’ Fish Antibiotics?


In a recent post Who Is Thomas Labs? The Manufacturer of Fish Antibiotics we discussed where we get our fish antibiotics from. One of the most frequent questions we are asked about the products that we carry is, “Can I take this fish antibiotic for myself?” Other versions of this question could be “Are fish antibiotics safe for humans to take?” or “Are these pet antibiotics I am giving to my pets the same thing I get from my doctor?” Very understandable questions, and we hope that we can answer these questions in a manner that we will not be misunderstood.

At we are a retailer of fish antibiotics, we also have bird antibiotics. However, we do not have any medical, pharmaceutical or veterinary training. Therefore, we cannot get into speculations or speak about things that are not established as fact. For this purpose we will stick with the basic facts about our company and its products.

The fish antibiotics that we carry are of the highest grade. They are in fact pharmaceutical grade fish antibiotics.


“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)

All the fish antibiotics that we carry are pharmaceutical grade antibiotics of the highest quality but they are manufactured for pet/animal use and are not intended to be used by humans in place of a prescription medication from a certified doctor.  If you look up the markings that are on the products we sell at you can verify that the medications we carry are in fact the USP grade medications they claim to be.  There are many reasons to consult a doctor if you are sick the most important reasons being without proper medical training it is very difficult to properly diagnose and prescribe what medications will work under what circumstance and of course make sure that the patient is not allergic to any of the medications.

If fish antibiotics are USP grade then why can’t I take them for myself?

It is illegal to sell any prescription drugs without a medical prescription which is why we only sell these products for fish and animal use.  As we stated earlier we are not trained pharmacists but there are lots of good reasons for requiring antibiotics to have a prescription for humans, mostly to keep you safe.  However, the fact is, doctors who have the proper training, have decided to impede individuals from using antibiotics without proper instructions and being monitored correctly.

Therefore, here at we cannot suggest the consumption of any of our products by a human being & discourage anyone from buying these products for personal use.

We hope that by providing you this information you leave with confidence knowing that using these fish and or bird antibiotics for your pets are the highest quality and best antibiotics available to help you pets stay healthy.  You can know with a surety that what they are taking will indeed help their ailment.  Don’t forget it is always important to consult with a qualified and licensed veterinarian to make sure you are using the right medication for your pet’s illness.

Tagged with: , , , , , ,

Who is Thomas Labs? The Manufacturer of Fish Antibiotics


Here at we pride ourselves on receiving our antibiotics from the most reputable source for fish, bird and other pet antibiotics! Thomas Labs has been in business since 1978 and has been an innovator in pet health and wellness products ever since.  The company was started by pet loving pharmacists who believe that animals have a right to good health care and should be given the opportunity to have a long, safe and healthy life. Thomas Labs also wanted to ensure that their own beloved pets would have an opportunity to have their life expectancy extended.

Working with veterinarians and animal care specialists, Thomas Labs creates unique formulas for pets, companion, and service animals.

Thomas Labs’ quote below depicts their conviction of the efficacy of their products:

“We will not make any product that we would not feel 100% confident using to help our own pets.” (Source: Thomas Labs About Us Page)

All of the antibiotics produced by Thomas Labs, whether that be Fish Antibiotics, Bird Antibiotics or Dewormers, are Pharmaceutical Grade Antibiotics. Thomas Labs is an Arizona based company so you can be assured that everything they produce is the highest quality possible.


“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)

This means you can be assured that your Fish, Birds or other pets will be getting the best possible treatment.

Tagged with: , , , ,

The New Thomas Laboratories Fish Antibiotics 12 Count Bottles

pen_12_maybe ebaymox_12 flex_12 cillin_12


Thomas Laboratories has released a few new bottles to their catalog! Some of their most popular items such as Fish Mox (Amoxicillin), Fish Flex (Cephalexin/Keflex), Fish Pen (Penicillin) and Fish Cillin (Ampicillin) now have a 12 count bottle in their line up.

Fish Mox 250 mg – 12 Count
Fish Flex 250 mg – 12 Count
Fish Pen 250 mg – 12 Count
Fish Cillin 250 mg – 12 Count

Have you ever bought antibiotics for your pet fish to help cure an ailment only to have many left over antibiotics after the treatment was complete because you had to buy bottles with a lot of pills in them? Instead of feeling like you wasted your money towards antibiotics you no longer need, you can now just buy a lower count amount. These new convenient sized bottles will save your wallet and save you from having excess antibiotics.

If you do need a larger sized bottle you can still find all of our pharmaceutical grade antibiotics on our website 



Tagged with: , , , , , ,

The Thomas Labs Bird Biotic Doxycycline Tablet is Back!


Here at, we are happy to announce that Thomas Laboratories has decided to bring back their Doxycyline antibiotic in tablet form.

For a time Thomas Labs, due to costs, decided to make a select group of their Pharmacy Grade Antibiotics in Powder Packet Packaging only, Bird Biotic was one such antibiotic. However, they have decided that the very popular Bird Biotic Tablet is the perfect item to come back in Tablet form. The instructions for the use of the Doxycycline Antibiotic are the same in Tablet form as they are in Powder Packet form.This is due to the fact that the antibiotic remains the same 100 mg strength in both forms of packaging.

Instructions Below:

Bird Biotic Doxycycline 100 mg – Doxycycline Hyclate can be used for systemic and local infections in racing pigeons, pet and exotic birds.

Directions: Add contents of one tablet (100 mg) to 8 ounces of drinking water. Make a fresh solution daily. Continue treatment for 7-10 days. 

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

Caution: Keep out of reach of children.  Bird Antibiotics are not intended for human consumption. Not to be given to birds that are intended for food use.

Bird Biotic Doxycyline is one of the many forms of Pharmacy Grade Antibiotics that we carry. If you are looking for Pharmacy Grade Antibiotics for your bird antibiotics or even for your fish antibiotics we are happy to provide you with first class service.

Looking for an antibiotic for another type of pet? Here is a link to all of our Pharmacy Grade Fish Antibiotics. Directions for use with other animals please consult with a veterinarian. The directions on the bottles will either be for fish or for birds.

What is the difference between Fish Mox and Fish Mox Forte?


Here at Fish Mox Fish Flex we often get asked the question, “What is the difference between the Fish Mox and the Fish Mox Forte antibiotic?”

This question does not only apply to the Fish Mox (Amoxicillin) antibiotic. Almost all of our antibiotics have a regular strength, such as Fish Mox, and an extra strength, such as the Fish Mox Forte. Both antibiotics have the same ingredients in them; both are filled with Pharmaceutical Grade Amoxicillin. The only difference between the two is the strength of the antibiotic that is in each capsule. The regular Fish Mox antibiotics have 250 mg of Amoxicillin in each capsule, whereas the extra strength Fish Mox Forte has 500 mg of Amoxicillin in each capsule.

The 250 mg and 500 mg dosage and strength is consistent with most of our fish antibiotics. The following products all have the regular 250 mg capsules or tablets and their 500 mg counterparts:

Fish Mox and Fish Mox Forte
Fish Flex and Fish Flex Forte
Fish Flox and Fish Flox Forte
Fish Pen and Fish Pen Forte
Fish Zole and Fish Zole Forte

However, there are a few outliers to this model.

The Fish Tapes and Fish Tapes Forte have the same concept of having a regular and extra strength.

Fish Tapes has 34 mg of Praziquantel in each capsule.

Fish Tapes Forte has 170 mg of Praziquantel in each capsule.

The other type of outlier to this model is the Fish Sulfa Forte. Fish Sulfa Forte has 800mg of Sulfamethoxazole and 160mg of Trimethoprim in each tablet. The odd thing about the Fish Sulfa Forte is that there is no regular Fish Sulfa, there is only the Fish Sulfa Forte.

About Fish Cillin – Ampicillin Fish Antibiotic

Product Information:

Fish Cillin is made with the ingredient Ampicillin. Each capsule contains 250 mg of ampicillin and can be purchased in either a 30 or 100 count bottle.

Fish Cillin

Fish Cillin label and instructions

Background Information:

Fish Cillin is manufactured by Thomas Laboratories which is located in Arizona. They manufacture many different pet health products. These fish antibiotics are pharmaceutical grade and do not require a prescription for purchase since they are sold for fish.

Effective Against:

Fish Cillin (Ampicillin) is useful for the control of some common bacterial diseases of fish, including fin and tail rot and flexibacter infections.  This is for Ornamental and Aquarium fish only, not intended for human consumption. If you would more details and uses you may consult a local pet store or veterinarian.

Instructions & How to Use:

Add contents of one capsule (250 mg) into aquarium for every 10 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change be done in between treatments. Duration of treatment depends on type and severity of infection; it is recommended that extended medication baths continue for a minimum of 5 days and for not more than 10 days.  Discontinue treatment if there is no improvement within 5 days.

Fish Mox Forte – The Most Popular Fish Antibiotic

We have been in the pet business for over six years and the most popular fish antibiotic is Fish Mox Forte.  Fish Mox Forte is Amoxicillin 500 mg.  Amoxicillin is one of the best broad range antibiotics available.