Can plecos live with assassin snails?

Verdict

Yes, with care

Yes, with care. Plecos and assassin snails can share a tank, but watch one thing. Plecos grow to 15 inches and need 125 gallons, far more than a tank set up for assassin snails.

Common pleco72–86°F · pH 6.5–7.5

Assassin snail75–80°F · pH 7–8

What to watch

Watch outPlecos grow to 15 inches and need 125 gallons, far more than a tank set up for assassin snails.

What works

Both are fine at 75–80°F.
pH 7–7.5 suits both.

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

	Common pleco	Assassin snail
Temperature	72–86 °F	75–80 °F
pH	6.5–7.5	7–8
Adult size	15.0 in	1.0 in
Minimum tank	125 gal	5 gal
Temperament	Peaceful	Peaceful
Swims at	Bottom	Bottom
Group	Alone or in pairs	Alone or in pairs
Diet	Herbivore	Carnivore

Better tank mates for plecos

All common pleco tank mates

Better tank mates for assassin snails

All assassin snail tank mates

Questions

Can plecos live with assassin snails?

Yes, with care. Plecos and assassin snails can share a tank, but watch one thing. Plecos grow to 15 inches and need 125 gallons, far more than a tank set up for assassin snails.

What temperature suits both plecos and assassin snails?

75–80 °F. Plecos need 72–86 °F, assassin snails need 75–80 °F.

What size tank do plecos and assassin snails need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.