Can cherry barbs live with upside down catfish?

Verdict
Yes

Yes, cherry barbs and upside down catfish can live together. Both are fine at 73–79°F. Plan on at least 30 gal.

Cherry barbCherry barb73–81°F · pH 6–7.5 Upside down catfishUpside down catfish72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Cherry barb 73–81°Upside down catfish 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Cherry barb 6–7.5Upside down catfish 6–7.5
The green band is the pH both tolerate.

Size to scale

Cherry barb · 2 inUpside down catfish · 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

Cherry barbUpside down catfish
Temperature73–81 °F72–79 °F
pH6–7.56–7.5
Adult size2.0 in4.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for cherry barbs

All cherry barb tank mates

Better tank mates for upside down catfish

All upside down catfish tank mates

Questions

Can cherry barbs live with upside down catfish?

Yes, cherry barbs and upside down catfish can live together. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both cherry barbs and upside down catfish?

73–79 °F. Cherry barbs need 73–81 °F, upside down catfish need 72–79 °F.

What size tank do cherry barbs and upside down catfish need together?

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