Can assassin snails live with arowanas?

Verdict

Yes, with care

Yes, with care. Assassin snails and arowanas can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

Assassin snail75–80°F · pH 7–8

Silver arowana75–86°F · pH 6–7

What to watch

Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.
Watch outLarge arowanas crack or pick at small snails. A big mystery snail has better odds than a ramshorn.
Watch outArowanas grow to 36 inches and need 250 gallons, far more than a tank set up for assassin snails.

What works

Both are fine at 75–80°F.
They use different parts of the tank: assassin snails the bottom, 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

	Assassin snail	Silver arowana
Temperature	75–80 °F	75–86 °F
pH	7–8	6–7
Adult size	1.0 in	36.0 in
Minimum tank	5 gal	250 gal
Temperament	Peaceful	Aggressive
Swims at	Bottom	Top
Group	Alone or in pairs	One per tank
Diet	Carnivore	Carnivore

Better tank mates for assassin snails

All assassin snail tank mates

Questions

Can assassin snails live with arowanas?

Yes, with care. Assassin snails and arowanas can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

What temperature suits both assassin snails and arowanas?

75–80 °F. Assassin snails need 75–80 °F, arowanas need 75–86 °F.

What size tank do assassin snails and arowanas need together?

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