Can arowanas live with tinfoil barbs?

Verdict
No

No. Arowanas and tinfoil barbs should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 12 inches tinfoil barbs do.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Silver arowana 75–86°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7Silver arowana 6–7Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Silver arowana · 36 inTinfoil barb · 12 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

Silver arowanaTinfoil barb
Temperature75–86 °F72–80 °F
pH6–76.5–7.5
Adult size36.0 in12.0 in
Minimum tank250 gal125 gal
TemperamentAggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 5+
DietCarnivoreOmnivore

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can arowanas live with tinfoil barbs?

No. Arowanas and tinfoil barbs should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 12 inches tinfoil barbs do.

What temperature suits both arowanas and tinfoil barbs?

75–80 °F. Arowanas need 75–86 °F, tinfoil barbs need 72–80 °F.

What size tank do arowanas and tinfoil barbs need together?

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