Can Cardinal Tetra Live With Serpae Tetra?
Cardinal Tetra and Serpae Tetra may coexist with careful monitoring, adequate space, and hiding spots.
Conditions: Minimum 20 gallon tank.
Parameter Comparison
| Parameter | Cardinal Tetra | Serpae Tetra | Overlap |
|---|---|---|---|
| Temperature | 73–81°F | 72–82°F | 73–81°F ✓ |
| pH Range | 4.5–7 | 5.5–7.5 | 5.5–7 ✓ |
| Temperament | peaceful | semi-aggressive | Monitor ⚠ |
| Max Size | 2" | 1.75" | Similar ✓ |
| Min Tank Size | 10 gal | 20 gal | 20 gal minimum together |
| Diet | Omnivore | Omnivore | — |
| Care Level | intermediate | beginner | — |
Tank Requirements for Cardinal Tetra + Serpae Tetra
To keep Cardinal Tetra and Serpae Tetra together, you need at minimum a 20 gallon tank. Cardinal Tetra should be kept in a school of 6+. Serpae Tetra should be kept in a school of 8+. 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 →Serpae Tetra
Hyphessobrycon eques
Serpae tetras are vibrant blood-red schooling fish with a distinctive black comma-shaped marking behind the gill plate. While beautiful, they have a reputation as fin nippers — especially in small groups. Keeping them in schools of 8+ in a spacious tank significantly reduces this behavior. They add bold color to community tanks when kept properly.
Full care guide →