Can Cardinal Tetra live with Discus? Not recommended
Temperature ranges don't overlap (73–81°F vs 82–88°F).
Side by side
| 🐟 Cardinal Tetra | 🐡 Discus | |
| Adult size | 2" | 6" |
| Min tank | 15 gal | 55 gal |
| Temperature | 73–81°F | 82–88°F |
| pH | 4.5–6.5 | 6–7 |
| Temperament | Peaceful | Peaceful |
Why
- Temperature ranges don't overlap (73–81°F vs 82–88°F).
- Large size gap — watch that Discus doesn't bully Cardinal Tetra.