Can pictus catfish live with rosy barbs?

Verdict
Yes

Yes. Pictus catfish and rosy barbs get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

Pictus catfishPictus catfish72–79°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°Pictus catfish 72–79°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6–7.5Pictus catfish 6–7.5Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Pictus catfish · 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

Pictus catfishRosy barb
Temperature72–79 °F64–77 °F
pH6–7.56–7.5
Adult size5.0 in4.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupGroups of 3+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for pictus catfish

All pictus catfish tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can pictus catfish live with rosy barbs?

Yes. Pictus catfish and rosy barbs get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both pictus catfish and rosy barbs?

72–77 °F. Pictus catfish need 72–79 °F, rosy barbs need 64–77 °F.

What size tank do pictus catfish and rosy barbs need together?

At least 55 gal, set by the pictus catfish. Add space for each extra fish.