GloFish are brilliantly colored and beautiful fish. A natural fluorescence gene was added to the fish which resulted in fish that are fluorescent at all times. All GloFish are captive-bred and the fluorescent color comes with natural breeding. Because GloFish are a type of danio, barb or tetra, their care requirements are the same.
average adult size:
up to 2 inches long
average life span:
up to 3 years with proper care
minimum aquarium size:
A well-balanced GloFish diet consists of:
Flakes, pellets, frozen or freeze-dried food.
Vary diet to ensure proper nutritional balance and include foods that are high in carotenoids and beta carotene to help keep their vibrant colors.
Things to remember when feeding your GloFish:
Best to feed small amounts twice a day, no more than fish will eat in 1 to 2 minutes.
Thaw frozen food before feeding.
Keep in an appropriately sized aquarium; provide plenty of substrate, rocks and hiding places.
Stable water quality and parameters are critical to the health of aquatic life. If you are unsure of your water quality, Petco provides free water testing.
Absorb light and then re-emit it, which gives the impression that they are "glowing."
Brilliant color that is enhanced by a black light.
Available in several bright colors.
They are schooling fish so recommend keeping in schools of five or more.
Daily: check filter, water temperature and other equipment. Weekly: check water quality at least once a week. Monthly: change 10 to 25% of the total volume of water every 2 to 4 weeks or as needed.
Introduce new inhabitants to the aquarium gradually.
Constant movement may irritate more sedate tank mates; keep with other similarly active species.
Signs of a Healthy Fish
Bright, even coloring
Avoid overcrowded conditions, which are a major cause of stress and disease. Maintain good water quality with regular water changes and adequate filtration.
loss of color or appetite
spots or fungus on body or mouth
Common Health Issues
Symptoms or Causes
Frayed or disintegrating fins; the base of the fins usually reddens.
Improve water quality; consult your aquatic veterinarian for treatment.
White cottony growth and/or discoloration of the eyes.
Quarantine fish; use a commercial antifungal remedy as directed.
Cloudy eyes, open sores, and/or reddening of the skin.
Improve water quality; use a commercial antibacterial remedy as directed.
White spots appear on fins and body; fish rubs against hard objects or swims awkwardly. Rapid respiration.
Quarantine fish immediately; use a commercial ich remedy as directed.
Ask a store partner about Petco’s selection of books on GloFish and the variety of private brand products available for the care and happiness of your new pet. All private brand products carry a 100% money-back guarantee.
Because all aquatic life are potential carriers of infectious diseases, such as Atypical Mycobacterium and Salmonella, always wash your hands before and after handling your aquatic life or habitat contents to help prevent the potential spread of disease.
Pregnant women, children under the age of 5, senior citizens and people with weakened immune systems should contact their physician before purchasing or caring for aquatic life and should consider not having aquatic life as a pet.
Go to the Centers for Disease Control at cdc.gov/healthypets for more information about aquatic life and disease.
This care sheet can cover the needs of other species.
Note:The information on this Care Sheet is not a substitute for veterinary care. If you need additional information, please refer to the sources on the following page or contact your veterinarian as appropriate.
Developed with and approved by a qualified veterinarian.
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