Can Molly Live With Cardinal Tetra?
Molly and Cardinal Tetra are compatible. Temperature overlap 73–81°F. Both peaceful.
Conditions: Minimum 20 gallon tank.
Parameter Comparison
| Parameter | Molly | Cardinal Tetra | Overlap |
|---|---|---|---|
| Temperature | 72–82°F | 73–81°F | 73–81°F ✓ |
| pH Range | 7–8.5 | 4.5–7 | 7–7 ✓ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 4.5" | 2" | Similar ✓ |
| Min Tank Size | 20 gal | 10 gal | 20 gal minimum together |
| Diet | Omnivore | Omnivore | — |
| Care Level | beginner | intermediate | — |
Tank Requirements for Molly + Cardinal Tetra
To keep Molly and Cardinal Tetra together, you need at minimum a 20 gallon tank. Molly should be kept in a school of 4+. Cardinal Tetra should be kept in a school of 6+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Molly
Poecilia sphenops
Mollies are versatile livebearers that come in many varieties including black, dalmatian, balloon, and sailfin. They prefer hard, alkaline water and can even tolerate brackish conditions. They are active, personable fish that breed easily.
Full care guide →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 →