Can Cardinal Tetra Live With Discus?
✅Compatible
Cardinal Tetra and Discus are compatible. Both peaceful.
Conditions: Minimum 55 gallon tank.
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Parameter Comparison
| Parameter | Cardinal Tetra | Discus | Overlap |
|---|---|---|---|
| Temperature | 73–81°F | 81–88°F | No overlap ✗ |
| pH Range | 4.5–6.5 | 5.5–7 | 5.5–7 ✓ |
| Temperament | peaceful | semi-aggressive | Monitor ⚠ |
| Max Size | 2" | 7.9" | Size mismatch ✗ |
| Min Tank Size | 11 gal | 53 gal | 55 gal minimum together |
| Diet | Omnivore | Omnivore | — |
| Care Level | beginner | advanced | — |
Tank Requirements for Cardinal Tetra + Discus
To keep Cardinal Tetra and Discus together, you need at minimum a 55 gallon tank. Cardinal Tetra should be kept in a school of 8+. Discus should be kept in a school of 5+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Cardinal Tetra
Paracheirodon axelrodi
beginnerpeaceful11+ gal
The Cardinal Tetra (Paracheirodon axelrodi) is a beginner freshwater species known for its blue, red coloration. Brighter color than neon tetra. Mid to Lower-Mid.
Full care guide →Discus
Symphysodon spp.
advancedsemi-aggressive53+ gal
The Discus (Symphysodon spp.) is a advanced freshwater species known for its multi-color (red, blue, brown, green variants) coloration. King of freshwater fish. Mid.
Full care guide →Other Compatible Tank Mates
For Cardinal Tetra:
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