Can rams live with arowanas?

Verdict
No

No. Rams and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches rams do.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–86°German blue ram 80–86°Silver arowana 75–86°
The green band is the temperature range both can live in.
456789Both: 6–7German blue ram 5–7Silver arowana 6–7
The green band is the pH both tolerate.

Size to scale

German blue ram · 2.5 inSilver arowana · 36 in0"6"12"18"24"30"36"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

German blue ramSilver arowana
Temperature80–86 °F75–86 °F
pH5–76–7
Adult size2.5 in36.0 in
Minimum tank20 gal250 gal
TemperamentPeacefulAggressive
Swims atBottomTop
GroupAlone or in pairsOne per tank
DietOmnivoreCarnivore

Better tank mates for rams

All german blue ram tank mates

Questions

Can rams live with arowanas?

No. Rams and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 2.5 inches rams do.

What temperature suits both rams and arowanas?

80–86 °F. Rams need 80–86 °F, arowanas need 75–86 °F.

What size tank do rams and arowanas need together?

At least 250 gal, set by the silver arowana. Add space for each extra fish.