Can black skirt tetras live with rosy barbs?

Verdict
Yes

Yes. Black skirt tetras and rosy barbs get along in the same tank. Both are fine at 70–77°F. Plan on at least 30 gal.

Black skirt tetraBlack skirt tetra70–80°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: 70–77°Black skirt tetra 70–80°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6–7.5Black skirt tetra 6–7.5Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Black skirt tetra · 2.5 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

Black skirt tetraRosy barb
Temperature70–80 °F64–77 °F
pH6–7.56–7.5
Adult size2.5 in4.0 in
Minimum tank15 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can black skirt tetras live with rosy barbs?

Yes. Black skirt tetras and rosy barbs get along in the same tank. Both are fine at 70–77°F. Plan on at least 30 gal.

What temperature suits both black skirt tetras and rosy barbs?

70–77 °F. Black skirt tetras need 70–80 °F, rosy barbs need 64–77 °F.

What size tank do black skirt tetras and rosy barbs need together?

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