Can firemouth cichlids live with electric blue acaras?

Verdict
Yes

Yes, firemouth cichlids and electric blue acaras can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

Firemouth cichlidFiremouth cichlid75–86°F · pH 6.5–8 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: 75–82°Firemouth cichlid 75–86°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Firemouth cichlid 6.5–8Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Firemouth cichlid · 6 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

Firemouth cichlidElectric blue acara
Temperature75–86 °F72–82 °F
pH6.5–86.5–7.5
Adult size6.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for firemouth cichlids

All firemouth cichlid tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can firemouth cichlids live with electric blue acaras?

Yes, firemouth cichlids and electric blue acaras can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both firemouth cichlids and electric blue acaras?

75–82 °F. Firemouth cichlids need 75–86 °F, electric blue acaras need 72–82 °F.

What size tank do firemouth cichlids and electric blue acaras need together?

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