Can bolivian rams live with rosy barbs?

Verdict
Yes

Yes. Bolivian rams and rosy barbs get along in the same tank. Both are fine at 72–77°F. Plan on at least 30 gal.

Bolivian ramBolivian ram72–79°F · pH 6–7.5 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°Bolivian ram 72–79°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6–7.5Bolivian ram 6–7.5Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Bolivian ram · 3 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

Bolivian ramRosy barb
Temperature72–79 °F64–77 °F
pH6–7.56–7.5
Adult size3.0 in4.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for bolivian rams

All bolivian ram tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can bolivian rams live with rosy barbs?

Yes. Bolivian rams and rosy barbs get along in the same tank. Both are fine at 72–77°F. Plan on at least 30 gal.

What temperature suits both bolivian rams and rosy barbs?

72–77 °F. Bolivian rams need 72–79 °F, rosy barbs need 64–77 °F.

What size tank do bolivian rams and rosy barbs need together?

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