Can cherry barbs live with ember tetras?

Verdict
Yes

Yes. Cherry barbs and ember tetras make a good pair. Both are fine at 73–81°F. Plan on at least 20 gal.

Cherry barbCherry barb73–81°F · pH 6–7.5 Ember tetraEmber tetra73–84°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Cherry barb 73–81°Ember tetra 73–84°
The green band is the temperature range both can live in.
456789Both: 6–7Cherry barb 6–7.5Ember tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Cherry barb · 2 inEmber tetra · 0.8 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 barbEmber tetra
Temperature73–81 °F73–84 °F
pH6–7.55.5–7
Adult size2.0 in0.8 in
Minimum tank20 gal5 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 ember tetras

All ember tetra tank mates

Questions

Can cherry barbs live with ember tetras?

Yes. Cherry barbs and ember tetras make a good pair. Both are fine at 73–81°F. Plan on at least 20 gal.

What temperature suits both cherry barbs and ember tetras?

73–81 °F. Cherry barbs need 73–81 °F, ember tetras need 73–84 °F.

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

At least 20 gal, set by the cherry barb. Add space for each extra fish.