Can mollies and pygmy corydoras live together?
No
Mollies and pygmy corydoras should not share a tank.
Why
- Mollies want a pH of 7.5 or higher, but pygmy corydoras want 7.4 or lower. No pH suits both.
What each one needs
| Molly | Pygmy corydoras | Both | |
|---|---|---|---|
| Temperature | 72–82°F (22–28°C) | 72–79°F (22–26°C) | 72–79°F (22–26°C) |
| pH | 7.5–8.5 | 6.4–7.4 | No overlap |
| Minimum tank | 20 gal (76 L) | 10 gal (38 L) | 20 gal (76 L) |
| Keep at least | 3 | 6 | |
| Adult size | 4 in (10.2 cm) | 1 in (2.5 cm) |