Can blue gouramis live with rosy barbs?

Verdict
Yes

Yes, blue gouramis and rosy barbs can live together. Both are fine at 72–77°F. Plan on at least 30 gal.

Blue gouramiBlue gourami72–82°F · pH 6–8 Rosy barbRosy barb64–77°F · pH 6–7.5

Why it works

Water side by side

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

Size to scale

Blue gourami · 5 inRosy barb · 4 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

Blue gouramiRosy barb
Temperature72–82 °F64–77 °F
pH6–86–7.5
Adult size5.0 in4.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for blue gouramis

All blue gourami tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can blue gouramis live with rosy barbs?

Yes, blue gouramis and rosy barbs can live together. Both are fine at 72–77°F. Plan on at least 30 gal.

What temperature suits both blue gouramis and rosy barbs?

72–77 °F. Blue gouramis need 72–82 °F, rosy barbs need 64–77 °F.

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

At least 30 gal, set by the blue gourami. Add space for each extra fish.