Can swordtails live with electric blue acaras?

Verdict
Yes

Yes, swordtails and electric blue acaras can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

SwordtailSwordtail72–79°F · pH 7–8.3 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: 72–79°Swordtail 72–79°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Swordtail 7–8.3Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Swordtail · 5 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

SwordtailElectric blue acara
Temperature72–79 °F72–82 °F
pH7–8.36.5–7.5
Adult size5.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for swordtails

All swordtail tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can swordtails live with electric blue acaras?

Yes, swordtails and electric blue acaras can live together. Both are fine at 72–79°F. Plan on at least 30 gal.

What temperature suits both swordtails and electric blue acaras?

72–79 °F. Swordtails need 72–79 °F, electric blue acaras need 72–82 °F.

What size tank do swordtails and electric blue acaras need together?

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