Can cherry barbs live with congo tetras?

Verdict
Yes

Yes. Cherry barbs and congo tetras make a good pair. Both are fine at 73–81°F. Plan on at least 30 gal.

Cherry barbCherry barb73–81°F · pH 6–7.5 Congo tetraCongo tetra73–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Cherry barb 73–81°Congo tetra 73–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Cherry barb 6–7.5Congo tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Cherry barb · 2 inCongo tetra · 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

Cherry barbCongo tetra
Temperature73–81 °F73–82 °F
pH6–7.56–7.5
Adult size2.0 in3.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for cherry barbs

All cherry barb tank mates

Better tank mates for congo tetras

All congo tetra tank mates

Questions

Can cherry barbs live with congo tetras?

Yes. Cherry barbs and congo tetras make a good pair. Both are fine at 73–81°F. Plan on at least 30 gal.

What temperature suits both cherry barbs and congo tetras?

73–81 °F. Cherry barbs need 73–81 °F, congo tetras need 73–82 °F.

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

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