Can jack dempseys live with arowanas?
Verdict
No
No. Jack dempseys and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 10 inches jack dempseys do.
What to watch
- Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 10 inches jack dempseys do.
- Deal breakerBoth are aggressive, and arowanas are much bigger, so jack dempseys lose.
- Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for jack dempseys.
What works
- Both are fine at 75–86°F.
- pH 6.5–7 suits both.
- They use different parts of the tank: jack dempseys the mid, arowanas the top.
Water side by side
Size to scale
Care at a glance
| Jack Dempsey | Silver arowana | |
|---|---|---|
| Temperature | 72–86 °F | 75–86 °F |
| pH | 6.5–7.5 | 6–7 |
| Adult size | 10.0 in | 36.0 in |
| Minimum tank | 55 gal | 250 gal |
| Temperament | Aggressive | Aggressive |
| Swims at | Middle | Top |
| Group | Alone or in pairs | One per tank |
| Diet | Carnivore | Carnivore |
Better tank mates for jack dempseys
Questions
Can jack dempseys live with arowanas?
No. Jack dempseys and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 10 inches jack dempseys do.
What temperature suits both jack dempseys and arowanas?
75–86 °F. Jack dempseys need 72–86 °F, arowanas need 75–86 °F.
What size tank do jack dempseys and arowanas need together?
At least 250 gal, set by the silver arowana. Add space for each extra fish.