Molly
Poecilia sphenops
A larger, adaptable livebearer that thrives in hard water and even tolerates light brackish conditions.
| Difficulty | Beginner |
| Min. Tank Size | 75 L |
| Temperature | 24.0–28.0 °C |
| pH Range | 7.5–8.5 |
| Max Size | 10.0 cm |
| Lifespan | 3-5 years |
| Diet | Omnivore |
| Temperament | Peaceful |
Care Guide
Mollies are bigger than guppies and need more space — a 75 litre tank is a sensible minimum. They strongly prefer hard, alkaline water and can develop the 'shimmies' in soft water.
Feed a diet rich in vegetable matter, as mollies graze algae and biofilm. A small amount of aquarium salt or naturally hard water keeps them at their best.
Behaviour
Active, sociable livebearers that graze algae constantly.
Compatibility
Good with guppies, platies, swordtails and other hard-water community fish.
Breeding
Livebearer producing large broods; fry are relatively large and easy to raise.
Disease Risks
Shimmies (often from soft water), ich and fungal infections. See our fish disease database for treatment.