Can honey gouramis live with harlequin rasboras?

Verdict
Yes

Yes, honey gouramis and harlequin rasboras can live together. Both are fine at 72–80°F. Plan on at least 10 gal.

Honey gouramiHoney gourami72–82°F · pH 6–7.5 Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–80°Honey gourami 72–82°Harlequin rasbora 72–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Honey gourami 6–7.5Harlequin rasbora 6–7.5
The green band is the pH both tolerate.

Size to scale

Honey gourami · 2 inHarlequin rasbora · 2 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

Honey gouramiHarlequin rasbora
Temperature72–82 °F72–80 °F
pH6–7.56–7.5
Adult size2.0 in2.0 in
Minimum tank10 gal10 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for honey gouramis

All honey gourami tank mates

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Questions

Can honey gouramis live with harlequin rasboras?

Yes, honey gouramis and harlequin rasboras can live together. Both are fine at 72–80°F. Plan on at least 10 gal.

What temperature suits both honey gouramis and harlequin rasboras?

72–80 °F. Honey gouramis need 72–82 °F, harlequin rasboras need 72–80 °F.

What size tank do honey gouramis and harlequin rasboras need together?

At least 10 gal, set by the honey gourami. Add space for each extra fish.