Can mystery snails live with otocinclus?

Verdict
Yes

Yes. Mystery snails and otocinclus make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

Mystery snailMystery snail68–82°F · pH 7–8 OtocinclusOtocinclus72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Mystery snail 68–82°Otocinclus 72–79°
The green band is the temperature range both can live in.
456789Both: 7–7.5Mystery snail 7–8Otocinclus 6–7.5
The green band is the pH both tolerate.

Size to scale

Mystery snail · 2 inOtocinclus · 2 in0"1"2"3"4"5"6"
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 snailOtocinclus
Temperature68–82 °F72–79 °F
pH7–86–7.5
Adult size2.0 in2.0 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupAlone or in pairsGroups of 6+
DietOmnivoreHerbivore

Better tank mates for mystery snails

All mystery snail tank mates

Better tank mates for otocinclus

All otocinclus tank mates

Questions

Can mystery snails live with otocinclus?

Yes. Mystery snails and otocinclus make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both mystery snails and otocinclus?

72–79 °F. Mystery snails need 68–82 °F, otocinclus need 72–79 °F.

What size tank do mystery snails and otocinclus need together?

At least 20 gal, set by the otocinclus. Add space for each extra fish.