Can koi live with mystery snails?

Verdict

Yes, with care

Yes, with care. Koi and mystery snails can share a tank, but watch one thing. Large koi crack or pick at small snails. A big mystery snail has better odds than a ramshorn.

Koi59–77°F · pH 7–8.5

Mystery snail68–82°F · pH 7–8

What to watch

Watch outLarge koi crack or pick at small snails. A big mystery snail has better odds than a ramshorn.

What works

Both are fine at 68–77°F.
pH 7–8 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

	Koi	Mystery snail
Temperature	59–77 °F	68–82 °F
pH	7–8.5	7–8
Adult size	24.0 in	2.0 in
Minimum tank	Pond	5 gal
Temperament	Peaceful	Peaceful
Swims at	All levels	Bottom
Group	Groups of 3+	Alone or in pairs
Diet	Omnivore	Omnivore

Better tank mates for koi

All koi tank mates

Better tank mates for mystery snails

All mystery snail tank mates

Questions

Can koi live with mystery snails?

Yes, with care. Koi and mystery snails can share a tank, but watch one thing. Large koi crack or pick at small snails. A big mystery snail has better odds than a ramshorn.

What temperature suits both koi and mystery snails?

68–77 °F. Koi need 59–77 °F, mystery snails need 68–82 °F.

What size tank do koi and mystery snails need together?

A pond. Koi outgrow indoor tanks.