Can apistogramma live with rosy barbs?

Verdict
Yes

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

ApistogrammaApistogramma75–84°F · pH 5–7 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°Apistogramma 75–84°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6–7Apistogramma 5–7Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Apistogramma · 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

ApistogrammaRosy barb
Temperature75–84 °F64–77 °F
pH5–76–7.5
Adult size3.0 in4.0 in
Minimum tank20 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for apistogramma

All apistogramma tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can apistogramma live with rosy barbs?

Yes. Apistogramma 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 apistogramma and rosy barbs?

75–77 °F. Apistogramma need 75–84 °F, rosy barbs need 64–77 °F.

What size tank do apistogramma and rosy barbs need together?

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