Can harlequin rasboras live with dojo loaches?

Verdict
Yes

Yes, harlequin rasboras and dojo loaches can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5 Dojo loachDojo loach59–77°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Harlequin rasbora 72–80°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Harlequin rasbora 6–7.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Harlequin rasbora · 2 inDojo loach · 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

Harlequin rasboraDojo loach
Temperature72–80 °F59–77 °F
pH6–7.56.5–8
Adult size2.0 in6.0 in
Minimum tank10 gal55 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can harlequin rasboras live with dojo loaches?

Yes, harlequin rasboras and dojo loaches can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both harlequin rasboras and dojo loaches?

72–77 °F. Harlequin rasboras need 72–80 °F, dojo loaches need 59–77 °F.

What size tank do harlequin rasboras and dojo loaches need together?

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