Can clown loaches live with boesemani rainbowfish?

Verdict
Yes

Yes. Clown loaches and boesemani rainbowfish get along in the same tank. Both are fine at 77–82°F. Plan on at least 75 gal.

Clown loachClown loach77–86°F · pH 6–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 77–82°Clown loach 77–86°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Clown loach 6–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Clown loach · 8 inBoesemani rainbowfish · 4 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 loachBoesemani rainbowfish
Temperature77–86 °F75–82 °F
pH6–7.57–8
Adult size8.0 in4.0 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 boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can clown loaches live with boesemani rainbowfish?

Yes. Clown loaches and boesemani rainbowfish get along in the same tank. Both are fine at 77–82°F. Plan on at least 75 gal.

What temperature suits both clown loaches and boesemani rainbowfish?

77–82 °F. Clown loaches need 77–86 °F, boesemani rainbowfish need 75–82 °F.

What size tank do clown loaches and boesemani rainbowfish need together?

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