Can flowerhorns live with electric blue acaras?

Verdict
No

No. Flowerhorns and electric blue acaras should not share a tank. Flowerhorns are aggressive and much bigger than electric blue acaras.

FlowerhornFlowerhorn80–89°F · pH 7–8 Electric blue acaraElectric blue acara72–82°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–82°Flowerhorn 80–89°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Flowerhorn 7–8Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Flowerhorn · 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

FlowerhornElectric blue acara
Temperature80–89 °F72–82 °F
pH7–86.5–7.5
Adult size12.0 in6.0 in
Minimum tank75 gal30 gal
TemperamentAggressiveSemi-aggressive
Swims atMiddleMiddle
GroupOne per tankAlone or in pairs
DietCarnivoreOmnivore

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can flowerhorns live with electric blue acaras?

No. Flowerhorns and electric blue acaras should not share a tank. Flowerhorns are aggressive and much bigger than electric blue acaras.

What temperature suits both flowerhorns and electric blue acaras?

80–82 °F. Flowerhorns need 80–89 °F, electric blue acaras need 72–82 °F.

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

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