Can hillstream loaches live with dojo loaches?

Verdict
Yes

Yes. Hillstream loaches and dojo loaches get along in the same tank. Both are fine at 68–75°F. Plan on at least 55 gal.

Hillstream loachHillstream loach68–75°F · pH 6.5–7.5 Dojo loachDojo loach59–77°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 68–75°Hillstream loach 68–75°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Hillstream loach 6.5–7.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Hillstream loach · 2.5 inDojo loach · 6 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

Hillstream loachDojo loach
Temperature68–75 °F59–77 °F
pH6.5–7.56.5–8
Adult size2.5 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupGroups of 3+Groups of 3+
DietHerbivoreOmnivore

Better tank mates for hillstream loaches

All hillstream loach tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can hillstream loaches live with dojo loaches?

Yes. Hillstream loaches and dojo loaches get along in the same tank. Both are fine at 68–75°F. Plan on at least 55 gal.

What temperature suits both hillstream loaches and dojo loaches?

68–75 °F. Hillstream loaches need 68–75 °F, dojo loaches need 59–77 °F.

What size tank do hillstream loaches and dojo loaches need together?

At least 55 gal, set by the dojo loach. Add space for each extra fish.