Can tiger barbs live with electric blue acaras?

Verdict
Yes

Yes. Tiger barbs and electric blue acaras get along in the same tank. Both are fine at 72–81°F. Plan on at least 30 gal.

Tiger barbTiger barb72–81°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: 72–81°Tiger barb 72–81°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Tiger barb 6–7.5Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 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

Tiger barbElectric blue acara
Temperature72–81 °F72–82 °F
pH6–7.56.5–7.5
Adult size3.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can tiger barbs live with electric blue acaras?

Yes. Tiger barbs and electric blue acaras get along in the same tank. Both are fine at 72–81°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and electric blue acaras?

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

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

At least 30 gal, set by the tiger barb. Add space for each extra fish.