How Many Zebra Oto in a 125-Gallon Tank?
In a 125-gallon tank you can comfortably keep about 6–156 Zebra Oto. As a schooling species, never keep fewer than 6.
Why
Stocking is driven by adult size and waste output, not just fish count. Zebra Oto reaches about 1.6" 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 | 1.6" |
|---|---|
| Minimum tank | 10 gallons |
| Temperature | 72–79°F |
| pH | 6–7.5 |
| Temperament | Peaceful |
| Schooling | Yes — group of 6+ |
| Diet | Herbivore |
| Care level | Moderate |
| Origin | Peru |