Poecilia sphenops
Molly
Mollies are popular aquarium fish known for their ability to adapt to fresh, brackish, and even saltwater. They are active swimmers and prolific breeders.
Ensure perfect water for Molly ➔
Perfect for Aquaware Monitoring
Caution: Highly Sensitive
This species reacts immediately to unstable water parameters. Even minor fluctuations can be critical. Continuous 24/7 monitoring with Aquaware is highly recommended.
Temperature
24 - 28 °C
75 - 82 °F
pH Value
7.5 - 8.5 pH
Acidity Level
Mineral Content (TDS)
200 - 600 ppm
⚠️ Hard water required
Did you know?
Mollies are excellent at eating surface film and hair algae in the aquarium.
Aquaware Pro Tip
Adding a bit of aquarium salt can help their health, as they thrive in harder water.
Natural Habitat
Freshwater streams and coastal brackish waters from the Southern US to Colombia.
Diet & Nutrition
Omnivore. Requires algae-based flakes, blanched vegetables, and small live foods.
Behavior
Peaceful but very active. Can be boisterous in small tanks.
Max Size
8-12 cm (3-4.5 inches)
Average adult size
Lifespan
3-5 years
Years with proper care
Swim Zone
Preferred tank region
Top 🐟
Mid 🐟
Bottom
Min. Tank
75 Liters
Recommended minimum size
Social
4 Fish
Small group required
Add. Space
15 L
Required per additional fish
(4 Gallons)
(4 Gallons)
💧 +15 Liters needed