Can severums live with assassin snails?

Verdict

Yes, with care

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

Severum74–84°F · pH 6–7

Assassin snail75–80°F · pH 7–8

What to watch

Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.
Watch outLarge severums crack or pick at small snails. A big mystery snail has better odds than a ramshorn.

What works

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

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

	Severum	Assassin snail
Temperature	74–84 °F	75–80 °F
pH	6–7	7–8
Adult size	8.0 in	1.0 in
Minimum tank	55 gal	5 gal
Temperament	Semi-aggressive	Peaceful
Swims at	Middle	Bottom
Group	Alone or in pairs	Alone or in pairs
Diet	Omnivore	Carnivore

Better tank mates for severums

All severum tank mates

Better tank mates for assassin snails

All assassin snail tank mates

Questions

Can severums live with assassin snails?

Yes, with care. Severums and assassin snails 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 severums and assassin snails?

75–80 °F. Severums need 74–84 °F, assassin snails need 75–80 °F.

What size tank do severums and assassin snails need together?

At least 55 gal, set by the severum. Add space for each extra fish.