How Many Phoenix Rasbora in a 20-Gallon Tank?
In a 20-gallon tank you can comfortably keep about 8–83 Phoenix Rasbora. As a schooling species, never keep fewer than 8.
Why
Stocking is driven by adult size and waste output, not just fish count. Phoenix Rasbora reaches about 0.8" with a light bioload, and needs 74–82°F water at pH 4.5–7. Always cycle the tank and test water before adding livestock.
| Adult size | 0.8" |
|---|---|
| Minimum tank | 10 gallons |
| Temperature | 74–82°F |
| pH | 4.5–7 |
| Temperament | Peaceful |
| Schooling | Yes — group of 8+ |
| Diet | Micropredator |
| Care level | Moderate |
| Origin | Indonesia |
More fish for a 20-gallon tank → Phoenix Rasbora tankmates →