Can glass catfish live with rosy barbs?

Verdict
Yes

Yes. Glass catfish and rosy barbs make a good pair. Both are fine at 75–77°F. Plan on at least 30 gal.

Glass catfishGlass catfish75–80°F · pH 6.5–7.5 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: 75–77°Glass catfish 75–80°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Glass catfish 6.5–7.5Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Glass catfish · 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

Glass catfishRosy barb
Temperature75–80 °F64–77 °F
pH6.5–7.56–7.5
Adult size3.0 in4.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for glass catfish

All glass catfish tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can glass catfish live with rosy barbs?

Yes. Glass catfish and rosy barbs make a good pair. Both are fine at 75–77°F. Plan on at least 30 gal.

What temperature suits both glass catfish and rosy barbs?

75–77 °F. Glass catfish need 75–80 °F, rosy barbs need 64–77 °F.

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

At least 30 gal, set by the glass catfish. Add space for each extra fish.