Contact GloFish

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Below are links to the most common questions about GloFish® fluorescent fish that we hope you will find helpful. If you don’t see the answer you are looking for, please contact us below.

Most Frequently Asked Questions:

Where can I get help with an online order for GloFish placed at If you placed an order for live fish on and need support, please fill out this form or call us at 1-800-GLO-FISH (800-456-3474) anytime between 8:00am – 5:30pm EST, Monday through Friday.

Can you help me with a GloFish branded kit, light, filter, plant or ornament? For any product related questions, please contact Tetra, which manufactures these products under a trademark license from our company. Their customer service contact page is or you can call Tetra’s customer service directly at 1-800-526-0650, anytime between 8:00am – 5:30pm EST, Monday through Friday.

I think my fish may be sick. What should I do? There are many factors which may contribute to the health of a fish. Because of this, if you have specific questions regarding a potential illness, the best suggestion we can offer is to contact a local veterinarian who works with fish and/or your local fish store, as they will often be the best sources for guidance in such matters. Please remember that any illness or symptoms should be diagnosed the same way as they would be for the GloFish’s non-fluorescent counterpart.

What should I do if I have a question regarding my GloFish aquarium kit?

Your satisfaction with GloFish® branded products is very important to us. GloFish branded products are manufactured under a trademark license by third-party companies, Tetra and Koller-Craft. These manufacturers would be very happy to help with you any questions or concerns. To determine which company produced your product, please click here to visit the Tetra product page. If you cannot find your aquarium kit on the Tetra product page, it is most likely manufactured by Koller-Craft.

If you have a GloFish product manufactured by Tetra, please contact their customer service by clicking here or you can call them directly at 1-800-526-0650.

If you have a GloFish® kit manufactured by Koller-Craft, you contact their customer service via email at or you can call them directly at (800) 545-1344, ext. 5200.

If you are unable to resolve your question or concern with these companies directly, please do not hesitate to contact us using the form below.

Is my GloFish pregnant?

Like their non-fluorescent counterparts, females carry unfertilized eggs upon reaching maturity, resulting in a “pregnant” look.

What should I do if my fish is behaving in an unusual or aggressive manner?

Like any other animal, fish are individuals with their own unique “personalities.” While their actions may sometimes seem strange to us, there is a relatively wide variety of behaviors that fish can normally display. However, if you have any doubts as to whether your fish’s behavior is normal, we would recommend contacting either your local fish store or a local veterinarian who works with fish. Both are good resources for fish-specific questions or concerns.

Aquarium setup and maintenance questions

Below are answers to the most common questions we receive about setting up and maintaining home aquariums.  In general, if you have a specific question about your particular aquarium, the best source for guidance is your local fish store.  In addition to checking with local experts, you may also find the tips and information on our GloFish Care page to be helpful.

  • What are the recommended pH levels? Aside from their brilliant color, fluorescent fish are the same as other fish, and accordingly, the pH level requirements are the same.  While the recommended pH level varies somewhat depending on the source, a pH range between 6 and 8 is generally fine. For additional information on this, we would recommend checking with your local fish store.
  • Do I need to use a filter? We strongly recommend using a filter. Because an aquarium is a living biological system, it will produce various toxins that should be removed from the water. A filter helps remove these toxins and also houses the majority of the beneficial bacteria, which are vital to maintaining healthy, happy fish. Please check with your local pet shop for advice on what type of filter would work best for your aquarium. For additional information on aquarium filters, please visit
  • Will blue, actinic, or black light harm my fish? We have never observed or heard of any problems related to the use of any of these lights with our fish. As with any light, however, it is important not to keep it on continuously. For additional lighting and display information, please visit our GloFish Display page.

Other Common Questions:

  • Where can I buy/find GloFish?

    For a list of GloFish® fluorescent fish retailers in your area, please visit our Store Locator. Because inventories change relatively frequently, please check with your local retailer for details on availability and pricing.
  • What other fish are GloFIsh compatible with?

    Like their non-fluorescent counterparts, our fish are community fish and will “play well” with other fish. However, not all fish are this way, so we generally advise that people check with their local retailer for specific information on whether their existing fish can peacefully co-exist with GloFish. Alternatively, for a partial, but still significant, listing of other community fish, please visit One point in particular to note is that our GloFish® Electric Green® Barbs can potentially become aggressive if they are not kept in groups of five or more. This is not necessary with our GloFish® Danios or GloFish® Tetras; while they prefer to be in groups of five or more, they will not become aggressive in smaller numbers.
  • Are GloFish freshwater or saltwater?

    Like their non-fluorescent counterparts, GloFish are freshwater fish. They should not be placed in a saltwater environment.
  • How can I become a retailer/wholesaler of GloFish within the United States?

    For more information about becoming a wholesale or retail provider of our fish, please send us a message through our contact form below, and we will respond to you as quickly as possible.
  • Where can I find photos of GloFIsh for my publication?

    Please feel free to use any of the photos posted in our GloFish Gallery. Please credit the photos to It is not necessary to contact us for specific permission.
  • Will there be new colors or species of GloFish?

    New types of GloFish may become available from time to time. Any announcements related to this will be posted on our Facebook and Twitter pages.
  • Restrictions on breeding GloFish

    As outlined in our licensing statement, the intentional breeding and/or sale, barter, or trade, of any offspring of GloFish® fluorescent fish is strictly prohibited.  As we hope you will understand, it is necessary for us to protect the very significant investment we have made in the development of GloFish.  For more information on the patents and related intellectual property rights that cover our fish, a complete licensing statement can be found on our License page.
  • Are GloFish dyed, injected, or individually altered?

    No, they are born beautiful!  GloFish® fluorescent fish are traditionally bred; they are not dyed, injected or individually altered in any way.  Their unique color is a hereditary trait that is passed from generation to generation, just like any other genetic trait.  For more information about this topic, please see the question entitled, Exactly how is the fluorescent protein gene added to the fish?

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