Can Cardinal Tetra Live With Discus?
Cardinal Tetra and Discus are compatible. Both peaceful.
Conditions: Minimum 55 gallon tank.
Parameter Comparison
| Parameter | Cardinal Tetra | Discus | Overlap |
|---|---|---|---|
| Temperature | 73–81°F | 82–88°F | No overlap ✗ |
| pH Range | 4.5–7 | 5.5–7 | 5.5–7 ✓ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 2" | 8" | Size mismatch ✗ |
| Min Tank Size | 10 gal | 55 gal | 55 gal minimum together |
| Diet | Omnivore | Carnivore/Omnivore | — |
| Care Level | intermediate | 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 6+. 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
Cardinal tetras look similar to neon tetras but have a red stripe that extends the entire length of their body (vs only the back half in neons). They prefer softer, more acidic water and are slightly more delicate, but their deeper coloration makes them highly sought after.
Full care guide →Discus
Symphysodon spp.
Discus are widely considered the king of freshwater aquarium fish. Their disk-shaped body, vivid colors, and graceful swimming make them the ultimate showpiece. However, they are among the most demanding freshwater fish to keep, requiring warm, soft, exceptionally clean water, frequent feedings, and a stress-free environment. Discus are not recommended for beginners.
Full care guide →