Can paradise fish live with electric blue acaras?

Verdict
Yes

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

Paradise fishParadise fish61–79°F · pH 6–8 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°Paradise fish 61–79°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Paradise fish 6–8Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Paradise fish · 3.5 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

Paradise fishElectric blue acara
Temperature61–79 °F72–82 °F
pH6–86.5–7.5
Adult size3.5 in6.0 in
Minimum tank20 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atTopMiddle
GroupOne per tankAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for paradise fish

All paradise fish tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can paradise fish live with electric blue acaras?

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

What temperature suits both paradise fish and electric blue acaras?

72–79 °F. Paradise fish need 61–79 °F, electric blue acaras need 72–82 °F.

What size tank do paradise fish and electric blue acaras need together?

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