Can rosy barbs live with kissing gouramis?

Verdict
Yes

Yes. Rosy barbs and kissing gouramis get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

Rosy barbRosy barb64–77°F · pH 6–7.5 Kissing gouramiKissing gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Rosy barb 64–77°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Rosy barb 6–7.5Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Rosy barb · 4 inKissing gourami · 10 in0"2"4"6"8"10"
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

Rosy barbKissing gourami
Temperature64–77 °F72–82 °F
pH6–7.56–8
Adult size4.0 in10.0 in
Minimum tank30 gal55 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for rosy barbs

All rosy barb tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can rosy barbs live with kissing gouramis?

Yes. Rosy barbs and kissing gouramis get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both rosy barbs and kissing gouramis?

72–77 °F. Rosy barbs need 64–77 °F, kissing gouramis need 72–82 °F.

What size tank do rosy barbs and kissing gouramis need together?

At least 55 gal, set by the kissing gourami. Add space for each extra fish.