Can hillstream loaches live with paradise fish?

Verdict
Yes

Yes, hillstream loaches and paradise fish can live together. Both are fine at 68–75°F. Plan on at least 20 gal.

Hillstream loachHillstream loach68–75°F · pH 6.5–7.5 Paradise fishParadise fish61–79°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 68–75°Hillstream loach 68–75°Paradise fish 61–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Hillstream loach 6.5–7.5Paradise fish 6–8
The green band is the pH both tolerate.

Size to scale

Hillstream loach · 2.5 inParadise fish · 3.5 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

Hillstream loachParadise fish
Temperature68–75 °F61–79 °F
pH6.5–7.56–8
Adult size2.5 in3.5 in
Minimum tank20 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomTop
GroupGroups of 3+One per tank
DietHerbivoreOmnivore

Better tank mates for hillstream loaches

All hillstream loach tank mates

Better tank mates for paradise fish

All paradise fish tank mates

Questions

Can hillstream loaches live with paradise fish?

Yes, hillstream loaches and paradise fish can live together. Both are fine at 68–75°F. Plan on at least 20 gal.

What temperature suits both hillstream loaches and paradise fish?

68–75 °F. Hillstream loaches need 68–75 °F, paradise fish need 61–79 °F.

What size tank do hillstream loaches and paradise fish need together?

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