Can hillstream loaches live with endlers?

Verdict
Yes

Yes, hillstream loaches and endlers can live together. Both are fine at 72–75°F. Plan on at least 20 gal.

Hillstream loachHillstream loach68–75°F · pH 6.5–7.5 Endler's livebearerEndler's livebearer72–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–75°Hillstream loach 68–75°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Hillstream loach 6.5–7.5Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Hillstream loach · 2.5 inEndler's livebearer · 1 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 loachEndler's livebearer
Temperature68–75 °F72–82 °F
pH6.5–7.57–8
Adult size2.5 in1.0 in
Minimum tank20 gal5 gal
TemperamentPeacefulPeaceful
Swims atBottomTop
GroupGroups of 3+Groups of 3+
DietHerbivoreOmnivore

Better tank mates for hillstream loaches

All hillstream loach tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can hillstream loaches live with endlers?

Yes, hillstream loaches and endlers can live together. Both are fine at 72–75°F. Plan on at least 20 gal.

What temperature suits both hillstream loaches and endlers?

72–75 °F. Hillstream loaches need 68–75 °F, endlers need 72–82 °F.

What size tank do hillstream loaches and endlers need together?

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