Can mystery snails live with killifish?

Verdict

Yes, with care

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

Mystery snail68–82°F · pH 7–8

Killifish70–77°F · pH 5.5–7

What to watch

Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.

What works

Both are fine at 70–77°F.
They use different parts of the tank: mystery snails the bottom, killifish 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

	Mystery snail	Killifish
Temperature	68–82 °F	70–77 °F
pH	7–8	5.5–7
Adult size	2.0 in	2.5 in
Minimum tank	5 gal	10 gal
Temperament	Peaceful	Peaceful
Swims at	Bottom	Top
Group	Alone or in pairs	Alone or in pairs
Diet	Omnivore	Carnivore

Better tank mates for mystery snails

All mystery snail tank mates

Better tank mates for killifish

All killifish tank mates

Questions

Can mystery snails live with killifish?

Yes, with care. Mystery snails and killifish 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 mystery snails and killifish?

70–77 °F. Mystery snails need 68–82 °F, killifish need 70–77 °F.

What size tank do mystery snails and killifish need together?

At least 10 gal, set by the killifish. Add space for each extra fish.