Can clown loaches live with congo tetras?

Verdict
Yes

Yes, clown loaches and congo tetras can live together. Both are fine at 77–82°F. Plan on at least 75 gal.

Clown loachClown loach77–86°F · pH 6–7.5 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: 77–82°Clown loach 77–86°Congo tetra 73–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Clown loach 6–7.5Congo tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Clown loach · 8 inCongo tetra · 3 in0"1"2"3"4"5"6"7"8"
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

Clown loachCongo tetra
Temperature77–86 °F73–82 °F
pH6–7.56–7.5
Adult size8.0 in3.0 in
Minimum tank75 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 5+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for clown loaches

All clown loach tank mates

Better tank mates for congo tetras

All congo tetra tank mates

Questions

Can clown loaches live with congo tetras?

Yes, clown loaches and congo tetras can live together. Both are fine at 77–82°F. Plan on at least 75 gal.

What temperature suits both clown loaches and congo tetras?

77–82 °F. Clown loaches need 77–86 °F, congo tetras need 73–82 °F.

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

At least 75 gal, set by the clown loach. Add space for each extra fish.