Can discus live with arowanas?
Verdict
No
No. Discus and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 6 inches discus do.
What to watch
- Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 6 inches discus do.
- Deal breakerArowanas are aggressive and will bully peaceful discus.
- Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for discus.
What works
- Both are fine at 82–86°F.
- pH 6–7 suits both.
- They use different parts of the tank: discus the mid, arowanas the top.
Water side by side
Size to scale
Care at a glance
| Discus | Silver arowana | |
|---|---|---|
| Temperature | 82–88 °F | 75–86 °F |
| pH | 5.5–7 | 6–7 |
| Adult size | 6.0 in | 36.0 in |
| Minimum tank | 55 gal | 250 gal |
| Temperament | Peaceful | Aggressive |
| Swims at | Middle | Top |
| Group | Groups of 5+ | One per tank |
| Diet | Carnivore | Carnivore |
Better tank mates for discus
Questions
Can discus live with arowanas?
No. Discus and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 6 inches discus do.
What temperature suits both discus and arowanas?
82–86 °F. Discus need 82–88 °F, arowanas need 75–86 °F.
What size tank do discus and arowanas need together?
At least 250 gal, set by the silver arowana. Add space for each extra fish.