Can mollies and fancy goldfish live together?
With care
Mollies and fancy goldfish can share a tank, but there is something to watch.
Why
- Their temperature ranges only meet at 72°F (22°C), which leaves no margin.
- Goldfish are slow, messy, cold-water fish. They do best in a tank with other goldfish.
What each one needs
| Molly | Fancy goldfish | Both | |
|---|---|---|---|
| Temperature | 72–82°F (22–28°C) | 65–72°F (18–22°C) | 72–72°F (22–22°C) |
| pH | 7.5–8.5 | 7.0–8.0 | 7.5–8.0 |
| Minimum tank | 20 gal (76 L) | 20 gal (76 L) | 20 gal (76 L) |
| Keep at least | 3 | 1 | |
| Adult size | 4 in (10.2 cm) | 7 in (17.8 cm) |
The smallest tank for both
A 29 gallons (110 L) tank holds 3 mollies and 1 fancy goldfish at about 83% of its stocking limit, which leaves room for more.