Can arowanas live with electric blue acaras?

Verdict

No. Arowanas and electric blue acaras should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 6 inches electric blue acaras do.

Silver arowana75–86°F · pH 6–7

Electric blue acara72–82°F · pH 6.5–7.5

What to watch

Deal breakerAn adult silver arowana eats fish that fit in its mouth, and at 6 inches electric blue acaras do.
Deal breakerArowanas are aggressive and much bigger than electric blue acaras.
Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for electric blue acaras.

What works

Both are fine at 75–82°F.
pH 6.5–7 suits both.
They use different parts of the tank: arowanas the top, electric blue acaras the mid.

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

	Silver arowana	Electric blue acara
Temperature	75–86 °F	72–82 °F
pH	6–7	6.5–7.5
Adult size	36.0 in	6.0 in
Minimum tank	250 gal	30 gal
Temperament	Aggressive	Semi-aggressive
Swims at	Top	Middle
Group	One per tank	Alone or in pairs
Diet	Carnivore	Omnivore

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can arowanas live with electric blue acaras?

No. Arowanas and electric blue acaras should not share a tank. An adult silver arowana eats fish that fit in its mouth, and at 6 inches electric blue acaras do.

What temperature suits both arowanas and electric blue acaras?

75–82 °F. Arowanas need 75–86 °F, electric blue acaras need 72–82 °F.

What size tank do arowanas and electric blue acaras need together?

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