Can rosy barbs live with pygmy corys?

Verdict
Yes

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

Rosy barbRosy barb64–77°F · pH 6–7.5 Pygmy coryPygmy cory72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Rosy barb 64–77°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Rosy barb 6–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Rosy barb · 4 inPygmy cory · 1 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

Rosy barbPygmy cory
Temperature64–77 °F72–79 °F
pH6–7.56–7.5
Adult size4.0 in1.0 in
Minimum tank30 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for rosy barbs

All rosy barb tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can rosy barbs live with pygmy corys?

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

What temperature suits both rosy barbs and pygmy corys?

72–77 °F. Rosy barbs need 64–77 °F, pygmy corys need 72–79 °F.

What size tank do rosy barbs and pygmy corys need together?

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