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Can Cardinal Tetra and Discus Live Together?
Not recommended
- Temperature ranges do not overlap (Cardinal Tetra: 73-81°F vs Discus: 82-88°F).
- Shared pH window: 5.5-7.0.
Side-by-side
| Parameter | Cardinal Tetra | Discus |
|---|---|---|
| Adult size | 2" | 8" |
| Min tank | 20 gal | 55 gal |
| Temperature | 73-81°F | 82-88°F |
| pH | 5.5-7 | 5.5-7 |
| Temperament | Peaceful | Peaceful |
| Diet | Omnivore | Carnivore |
Recommended shared tank: 55 gallons or larger. Target pH 5.5-7.0.
FAQ
Can Cardinal Tetra and Discus live together?
Not recommended. Temperature ranges do not overlap (Cardinal Tetra: 73-81°F vs Discus: 82-88°F).
What size tank do Cardinal Tetra and Discus need together?
Plan for at least 55 gallons, more if you keep schooling groups of either species.
See full care guides: Cardinal Tetra · Discus