Can boesemani rainbowfish live with arowanas?

Verdict

No. Boesemani rainbowfish and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 4 inches boesemani rainbowfish do.

Boesemani rainbowfish75–82°F · pH 7–8

Silver arowana75–86°F · pH 6–7

What to watch

Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 4 inches boesemani rainbowfish do.
Deal breakerArowanas are aggressive and will bully peaceful boesemani rainbowfish.
Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.
Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for boesemani rainbowfish.

What works

Both are fine at 75–82°F.
They use different parts of the tank: boesemani rainbowfish the mid, arowanas the top.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

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

	Boesemani rainbowfish	Silver arowana
Temperature	75–82 °F	75–86 °F
pH	7–8	6–7
Adult size	4.0 in	36.0 in
Minimum tank	30 gal	250 gal
Temperament	Peaceful	Aggressive
Swims at	Middle	Top
Group	Groups of 6+	One per tank
Diet	Omnivore	Carnivore

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can boesemani rainbowfish live with arowanas?

No. Boesemani rainbowfish and arowanas should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 4 inches boesemani rainbowfish do.

What temperature suits both boesemani rainbowfish and arowanas?

75–82 °F. Boesemani rainbowfish need 75–82 °F, arowanas need 75–86 °F.

What size tank do boesemani rainbowfish and arowanas need together?

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