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Can Cardinal Tetra and Betta (male) Live Together?
Compatible with caution
- Shared temperature window: 76-81°F.
- Shared pH window: 6.5-7.0.
- Bettas are unpredictable; avoid bright/long-finned tankmates and have a backup plan.
Side-by-side
| Parameter | Cardinal Tetra | Betta (male) |
|---|---|---|
| Adult size | 2" | 2.5" |
| Min tank | 20 gal | 5 gal |
| Temperature | 73-81°F | 76-82°F |
| pH | 5.5-7 | 6.5-7.5 |
| Temperament | Peaceful | Aggressive |
| Diet | Omnivore | Carnivore |
Recommended shared tank: 20 gallons or larger. Keep at 76-81°F. Target pH 6.5-7.0.
FAQ
Can Cardinal Tetra and Betta (male) live together?
Compatible with caution. Shared temperature window: 76-81°F.
What size tank do Cardinal Tetra and Betta (male) need together?
Plan for at least 20 gallons, more if you keep schooling groups of either species.
See full care guides: Cardinal Tetra · Betta (male)