How Many X-Ray Tetra in a 75-Gallon Tank?
In a 75-gallon tank you can comfortably keep about 6–69 X-Ray Tetra. As a schooling species, never keep fewer than 6.
Why
Stocking is driven by adult size and waste output, not just fish count. X-Ray Tetra reaches about 1.8" with a moderate bioload, and needs 72–82°F water at pH 6–7.5. Always cycle the tank and test water before adding livestock.
| Adult size | 1.8" |
|---|---|
| Minimum tank | 15 gallons |
| Temperature | 72–82°F |
| pH | 6–7.5 |
| Temperament | Peaceful |
| Schooling | Yes — group of 6+ |
| Diet | Omnivore |
| Care level | Easy |
| Origin | Northern South America |