Can congo tetras live with gold barbs?

Verdict
Yes

Yes. Congo tetras and gold barbs get along in the same tank. Both are fine at 73–75°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°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: 73–75°Congo tetra 73–82°Gold barb 64–75°
The green band is the temperature range both can live in.
456789Both: 6–7.5Congo tetra 6–7.5Gold barb 6–8
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 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

Congo tetraGold barb
Temperature73–82 °F64–75 °F
pH6–7.56–8
Adult size3.0 in3.0 in
Minimum tank30 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for gold barbs

All gold barb tank mates

Questions

Can congo tetras live with gold barbs?

Yes. Congo tetras and gold barbs get along in the same tank. Both are fine at 73–75°F. Plan on at least 30 gal.

What temperature suits both congo tetras and gold barbs?

73–75 °F. Congo tetras need 73–82 °F, gold barbs need 64–75 °F.

What size tank do congo tetras and gold barbs need together?

At least 30 gal, set by the congo tetra. Add space for each extra fish.