Can platies live with electric blue acaras?

Verdict
Yes

Yes, platies and electric blue acaras can live together. Both are fine at 72–80°F. Plan on at least 30 gal.

PlatyPlaty70–80°F · pH 7–8.2 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: 72–80°Platy 70–80°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Platy 7–8.2Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 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

PlatyElectric blue acara
Temperature70–80 °F72–82 °F
pH7–8.26.5–7.5
Adult size2.5 in6.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can platies live with electric blue acaras?

Yes, platies and electric blue acaras can live together. Both are fine at 72–80°F. Plan on at least 30 gal.

What temperature suits both platies and electric blue acaras?

72–80 °F. Platies need 70–80 °F, electric blue acaras need 72–82 °F.

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

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