How Many Neon Tetra in a 55-Gallon Tank?
In a 55-gallon tank you can comfortably keep about 6–61 Neon Tetra. As a schooling species, never keep fewer than 6.
Why
Stocking is driven by adult size and waste output, not just fish count. Neon Tetra reaches about 1.5" with a moderate bioload, and needs 68–78°F water at pH 5–7. Always cycle the tank and test water before adding livestock.
| Adult size | 1.5" |
|---|---|
| Minimum tank | 10 gallons |
| Temperature | 68–78°F |
| pH | 5–7 |
| Temperament | Peaceful |
| Schooling | Yes — group of 6+ |
| Diet | Omnivore |
| Care level | Easy |
| Origin | Amazon basin (Peru, Brazil, Colombia) |