Can chili rasboras live with rosy barbs?

Verdict
Yes

Yes. Chili rasboras and rosy barbs get along in the same tank. Both are fine at 75–77°F. Plan on at least 30 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 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: 75–77°Chili rasbora 75–82°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6–7Chili rasbora 4–7Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 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

Chili rasboraRosy barb
Temperature75–82 °F64–77 °F
pH4–76–7.5
Adult size0.8 in4.0 in
Minimum tank5 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 8+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can chili rasboras live with rosy barbs?

Yes. Chili rasboras and rosy barbs get along in the same tank. Both are fine at 75–77°F. Plan on at least 30 gal.

What temperature suits both chili rasboras and rosy barbs?

75–77 °F. Chili rasboras need 75–82 °F, rosy barbs need 64–77 °F.

What size tank do chili rasboras and rosy barbs need together?

At least 30 gal, set by the rosy barb. Add space for each extra fish.