Can male bettas and fancy goldfish live together?
No
Male bettas and fancy goldfish should not share a tank.
Why
- Male bettas need at least 76°F (24°C), but fancy goldfish should stay at or below 72°F (22°C). No temperature suits both.
- Goldfish are slow, messy, cold-water fish. They do best in a tank with other goldfish.
What each one needs
| Betta (male) | Fancy goldfish | Both | |
|---|---|---|---|
| Temperature | 76–82°F (24–28°C) | 65–72°F (18–22°C) | No overlap |
| pH | 6.5–7.5 | 7.0–8.0 | 7.0–7.5 |
| Minimum tank | 5 gal (19 L) | 20 gal (76 L) | 20 gal (76 L) |
| Keep at least | 1 | 1 | |
| Adult size | 2.5 in (6.4 cm) | 7 in (17.8 cm) |