Can Betta Fish Live With Molly?
Betta Fish and Molly may coexist with careful monitoring, adequate space, and hiding spots.
Conditions: Minimum 20 gallon tank.
Parameter Comparison
| Parameter | Betta Fish | Molly | Overlap |
|---|---|---|---|
| Temperature | 76–82°F | 72–82°F | 76–82°F ✓ |
| pH Range | 6.5–7.5 | 7–8.5 | 7–7.5 ✓ |
| Temperament | semi-aggressive | peaceful | Monitor ⚠ |
| Max Size | 3" | 4.5" | Similar ✓ |
| Min Tank Size | 5 gal | 20 gal | 20 gal minimum together |
| Diet | Carnivore | Omnivore | — |
| Care Level | beginner | beginner | — |
Tank Requirements for Betta Fish + Molly
To keep Betta Fish and Molly together, you need at minimum a 20 gallon tank. Molly should be kept in a school of 4+. Provide adequate filtration, stable temperature with a heater, and hiding spots to reduce stress.
Species Profiles
Betta Fish
Betta splendens
The Betta fish (Siamese fighting fish) is one of the most popular freshwater aquarium fish in the world, known for its stunning flowing fins and vibrant colors. Males are territorial and should be kept alone or with carefully chosen tank mates. Despite their reputation as low-maintenance fish, bettas thrive best in heated, filtered tanks of at least 5 gallons.
Full care guide →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 →