Neon Tetra Care Guide
This page is educational reference material for preparing questions. A licensed veterinarian examines the animal, makes the diagnosis, and sets the treatment.
Guide to keeping neon tetras including school size, tank setup, water parameters, diet, compatible tank mates, and neon tetra disease.
Housing and Enclosure
Neon tetras need a minimum 10-gallon planted aquarium with gentle filtration. They prefer slightly acidic water (pH 6.0-7.0) and temperatures of 70-81°F. Keep in schools of at least 6, ideally 10+. Provide dim to moderate lighting and plenty of plant cover to mimic their natural habitat.
Diet and Nutrition
Feed high-quality micro-pellets or crushed flake food as a staple, supplemented with frozen or freeze-dried bloodworms, brine shrimp, and daphnia. Feed small amounts 1-2 times daily. Neon tetras have small mouths, so ensure food particles are small enough for them to consume.
Health and Veterinary Care
The most serious neon tetra health concern is Neon Tetra Disease (NTD), caused by the parasite Pleistophora hyphessobryconis. There is no cure — infected fish must be removed promptly. Other common issues include ich and fin rot. Quarantine new fish and maintain excellent water quality.
Common Health Issues
- Ammonia and nitrite poisoning: The most common aquarium problem. It follows an uncycled tank, overfeeding, a dead fish left in the tank, or a filter that stopped. Both should read 0 ppm.
- Temperature stress: Fish cannot regulate their own body temperature, so every body process follows the water. Use a thermometer, and a thermostat heater for tropical species.
- Ich and other parasites: Usually brought in on new fish or plants. Quarantine new arrivals in a separate tank before they join the display.
- Bacterial infections such as fin rot: Usually follow poor water quality or an injury.
- Medication harm: Copper treatments are toxic to shrimp, snails, and plants and can set back the filter bacteria, so ammonia and nitrite need watching for weeks afterward.
Source: Merck Veterinary Manual: Management of Aquarium Fish.
Stocking and Stress Reduction
- Float a new fish's bag to match temperature, then mix in tank water slowly before release.
- Add a few fish at a time so the filter bacteria can catch up with the extra waste.
- Check adult size, temperament, and water needs before buying a tank mate.
- Keep hands out of the tank when you can, and wash them before and after maintenance.
- Use a net only when you must; chasing fish around the tank is a stressor in itself.
Are neon tetras good for beginner fish keepers?
They can be, in a mature, planted tank of at least 10 gallons with slightly acidic water. Keep at least 6, ideally 10 or more, and quarantine new fish because Neon Tetra Disease has no cure.
What is Neon Tetra Disease?
A parasitic infection caused by Pleistophora hyphessobryconis. There is no cure, so infected fish should be removed promptly to protect the rest of the school.