Can mystery snails live with hillstream loaches?

Verdict
Yes

Yes. Mystery snails and hillstream loaches make a good pair. Both are fine at 68–75°F. Plan on at least 20 gal.

Mystery snailMystery snail68–82°F · pH 7–8 Hillstream loachHillstream loach68–75°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 68–75°Mystery snail 68–82°Hillstream loach 68–75°
The green band is the temperature range both can live in.
456789Both: 7–7.5Mystery snail 7–8Hillstream loach 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Mystery snail · 2 inHillstream loach · 2.5 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 snailHillstream loach
Temperature68–82 °F68–75 °F
pH7–86.5–7.5
Adult size2.0 in2.5 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupAlone or in pairsGroups of 3+
DietOmnivoreHerbivore

Better tank mates for mystery snails

All mystery snail tank mates

Better tank mates for hillstream loaches

All hillstream loach tank mates

Questions

Can mystery snails live with hillstream loaches?

Yes. Mystery snails and hillstream loaches make a good pair. Both are fine at 68–75°F. Plan on at least 20 gal.

What temperature suits both mystery snails and hillstream loaches?

68–75 °F. Mystery snails need 68–82 °F, hillstream loaches need 68–75 °F.

What size tank do mystery snails and hillstream loaches need together?

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