Can cherry barbs live with electric blue acaras?

Verdict
Yes

Yes. Cherry barbs and electric blue acaras 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 Electric blue acaraElectric blue acara72–82°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Cherry barb 73–81°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Cherry barb 6–7.5Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Cherry barb · 2 inElectric blue acara · 6 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 barbElectric blue acara
Temperature73–81 °F72–82 °F
pH6–7.56.5–7.5
Adult size2.0 in6.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for cherry barbs

All cherry barb tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can cherry barbs live with electric blue acaras?

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

What temperature suits both cherry barbs and electric blue acaras?

73–81 °F. Cherry barbs need 73–81 °F, electric blue acaras need 72–82 °F.

What size tank do cherry barbs and electric blue acaras need together?

At least 30 gal, set by the electric blue acara. Add space for each extra fish.