How Many Pygmy Cory in a 55-Gallon Tank?
In a 55-gallon tank you can comfortably keep about 8–152 Pygmy Cory. As a schooling species, never keep fewer than 8.
Why
Stocking is driven by adult size and waste output, not just fish count. Pygmy Cory reaches about 1.2" with a light bioload, and needs 72–79°F water at pH 6–7.5. Always cycle the tank and test water before adding livestock.
| Adult size | 1.2" |
|---|---|
| Minimum tank | 10 gallons |
| Temperature | 72–79°F |
| pH | 6–7.5 |
| Temperament | Peaceful |
| Schooling | Yes — group of 8+ |
| Diet | Omnivore |
| Care level | Easy |
| Origin | Madeira basin, Brazil |