Can kuhli loaches live with discus?

Verdict
Yes

Yes. Kuhli loaches and discus make a good pair. Both are fine at 82–86°F. Plan on at least 55 gal.

Kuhli loachKuhli loach75–86°F · pH 5.5–7 DiscusDiscus82–88°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 82–86°Kuhli loach 75–86°Discus 82–88°
The green band is the temperature range both can live in.
456789Both: 5.5–7Kuhli loach 5.5–7Discus 5.5–7
The green band is the pH both tolerate.

Size to scale

Kuhli loach · 3.5 inDiscus · 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

Kuhli loachDiscus
Temperature75–86 °F82–88 °F
pH5.5–75.5–7
Adult size3.5 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 5+
DietOmnivoreCarnivore

Better tank mates for kuhli loaches

All kuhli loach tank mates

Better tank mates for discus

All discus tank mates

Questions

Can kuhli loaches live with discus?

Yes. Kuhli loaches and discus make a good pair. Both are fine at 82–86°F. Plan on at least 55 gal.

What temperature suits both kuhli loaches and discus?

82–86 °F. Kuhli loaches need 75–86 °F, discus need 82–88 °F.

What size tank do kuhli loaches and discus need together?

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