Can upside down catfish live with gold barbs?

Verdict
Yes

Yes. Upside down catfish and gold barbs get along in the same tank. Both are fine at 72–75°F. Plan on at least 30 gal.

Upside down catfishUpside down catfish72–79°F · pH 6–7.5 Gold barbGold barb64–75°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–75°Upside down catfish 72–79°Gold barb 64–75°
The green band is the temperature range both can live in.
456789Both: 6–7.5Upside down catfish 6–7.5Gold barb 6–8
The green band is the pH both tolerate.

Size to scale

Upside down catfish · 4 inGold barb · 3 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

Upside down catfishGold barb
Temperature72–79 °F64–75 °F
pH6–7.56–8
Adult size4.0 in3.0 in
Minimum tank30 gal20 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for upside down catfish

All upside down catfish tank mates

Better tank mates for gold barbs

All gold barb tank mates

Questions

Can upside down catfish live with gold barbs?

Yes. Upside down catfish and gold barbs get along in the same tank. Both are fine at 72–75°F. Plan on at least 30 gal.

What temperature suits both upside down catfish and gold barbs?

72–75 °F. Upside down catfish need 72–79 °F, gold barbs need 64–75 °F.

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

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