Common GuppyPoecilia reticulata
Black MollyPoecilia sphenops
Verdict:compatible
- Behaviour: compatible
- Water: ranges overlap
Why
Both fish are peaceful livebearers, and both need hard, alkaline water. The molly is larger than the guppy and needs a tank of at least 150 l. Otherwise these two fish are compatible.
Water and size
| Parameter | Common Guppy | Black Molly | Shared range |
|---|---|---|---|
| Temperature | 17 – 28 °C (63 – 82 °F) | 21 – 26 °C (70 – 79 °F) | 21 – 26 °C (70 – 79 °F) ranges overlap |
| Water pH | 7 – 8.5 | 7 – 8.5 | 7 – 8.5 ranges overlap |
| Water dH | 10 – 30 | 15 – 30 | 15 – 30 ranges overlap |
| Size in aquarium | 3 – 6 cm (1.2 – 2.4 in) | 8 – 12 cm (3.1 – 4.7 in) | |
| Required aquarium volume | from 40 L (11 gal) | from 150 L (40 gal) | |
| Keeping | Mixed (solitary / pair / group) | Mixed (solitary / pair / group) | |
| Temperament | Peaceful (regular) | Peaceful (regular) | |
| Swimming level | near the surface | near the surface |
This is a general estimate: fish of the same species differ in character. Tank volume is given for each species separately — two species together need at least the larger of the two, and usually more.
Other pairs with these fish
- Siamese Fighting Fish + Common Guppy not recommended
- Siamese Fighting Fish + Black Molly not recommended
- Goldfish + Common Guppy with caution
- Goldfish + Black Molly with caution
- Angelfish + Common Guppy with caution
- Angelfish + Black Molly not recommended
- Common Guppy + Neon Tetra with caution
- Common Guppy + Common Platy compatible
- Common Guppy + Bronze Corydoras compatible
- Common Guppy + Sumatran Barb not recommended
- Common Guppy + Oscar Cichlid not recommended
- Neon Tetra + Black Molly not recommended
- Black Molly + Common Platy compatible
- Black Molly + Bronze Corydoras compatible
- Black Molly + Sumatran Barb with caution
- Black Molly + Oscar Cichlid not recommended