Can dwarf neon rainbowfish live with electric blue acaras?

Verdict
Yes

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

Dwarf neon rainbowfishDwarf neon rainbowfish75–82°F · pH 6.5–7.5 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°Dwarf neon rainbowfish 75–82°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Dwarf neon rainbowfish 6.5–7.5Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Dwarf neon rainbowfish · 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

Dwarf neon rainbowfishElectric blue acara
Temperature75–82 °F72–82 °F
pH6.5–7.56.5–7.5
Adult size2.5 in6.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can dwarf neon rainbowfish live with electric blue acaras?

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

What temperature suits both dwarf neon rainbowfish and electric blue acaras?

75–82 °F. Dwarf neon rainbowfish need 75–82 °F, electric blue acaras need 72–82 °F.

What size tank do dwarf neon rainbowfish and electric blue acaras need together?

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