Can clown loaches live with apistogramma?

Verdict
Yes

Yes, clown loaches and apistogramma can live together. Both are fine at 77–84°F. Plan on at least 75 gal.

Clown loachClown loach77–86°F · pH 6–7.5 ApistogrammaApistogramma75–84°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 77–84°Clown loach 77–86°Apistogramma 75–84°
The green band is the temperature range both can live in.
456789Both: 6–7Clown loach 6–7.5Apistogramma 5–7
The green band is the pH both tolerate.

Size to scale

Clown loach · 8 inApistogramma · 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 loachApistogramma
Temperature77–86 °F75–84 °F
pH6–7.55–7
Adult size8.0 in3.0 in
Minimum tank75 gal20 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomBottom
GroupGroups of 5+Alone or in pairs
DietOmnivoreCarnivore

Better tank mates for clown loaches

All clown loach tank mates

Better tank mates for apistogramma

All apistogramma tank mates

Questions

Can clown loaches live with apistogramma?

Yes, clown loaches and apistogramma can live together. Both are fine at 77–84°F. Plan on at least 75 gal.

What temperature suits both clown loaches and apistogramma?

77–84 °F. Clown loaches need 77–86 °F, apistogramma need 75–84 °F.

What size tank do clown loaches and apistogramma need together?

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