Can kuhli loaches live with congo tetras?

Verdict
Yes

Yes, kuhli loaches and congo tetras can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

Kuhli loachKuhli loach75–86°F · pH 5.5–7 Congo tetraCongo tetra73–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Kuhli loach 75–86°Congo tetra 73–82°
The green band is the temperature range both can live in.
456789Both: 6–7Kuhli loach 5.5–7Congo tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Kuhli loach · 3.5 inCongo tetra · 3 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 loachCongo tetra
Temperature75–86 °F73–82 °F
pH5.5–76–7.5
Adult size3.5 in3.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for kuhli loaches

All kuhli loach tank mates

Better tank mates for congo tetras

All congo tetra tank mates

Questions

Can kuhli loaches live with congo tetras?

Yes, kuhli loaches and congo tetras can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both kuhli loaches and congo tetras?

75–82 °F. Kuhli loaches need 75–86 °F, congo tetras need 73–82 °F.

What size tank do kuhli loaches and congo tetras need together?

At least 30 gal, set by the congo tetra. Add space for each extra fish.