Can oscars live with electric blue acaras?

Verdict
Yes

Yes. Oscars and electric blue acaras get along in the same tank. Both are fine at 74–81°F. Plan on at least 75 gal.

OscarOscar74–81°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: 74–81°Oscar 74–81°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Oscar 6–8Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Oscar · 12 inElectric blue acara · 6 in0"2"4"6"8"10"12"
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

OscarElectric blue acara
Temperature74–81 °F72–82 °F
pH6–86.5–7.5
Adult size12.0 in6.0 in
Minimum tank75 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupAlone or in pairsAlone or in pairs
DietCarnivoreOmnivore

Better tank mates for oscars

All oscar tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can oscars live with electric blue acaras?

Yes. Oscars and electric blue acaras get along in the same tank. Both are fine at 74–81°F. Plan on at least 75 gal.

What temperature suits both oscars and electric blue acaras?

74–81 °F. Oscars need 74–81 °F, electric blue acaras need 72–82 °F.

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

At least 75 gal, set by the oscar. Add space for each extra fish.