How Many Ember Tetra in a 40-Gallon Tank?
In a 40-gallon tank you can comfortably keep about 8–166 Ember Tetra. As a schooling species, never keep fewer than 8.
Why
Stocking is driven by adult size and waste output, not just fish count. Ember Tetra reaches about 0.8" with a light bioload, and needs 73–84°F water at pH 5–7. Always cycle the tank and test water before adding livestock.
| Adult size | 0.8" |
|---|---|
| Minimum tank | 10 gallons |
| Temperature | 73–84°F |
| pH | 5–7 |
| Temperament | Peaceful |
| Schooling | Yes — group of 8+ |
| Diet | Omnivore |
| Care level | Moderate |
| Origin | Araguaia basin, Brazil |