Can serpae tetras live with electric blue acaras?

Verdict
Yes

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

Serpae tetraSerpae tetra72–79°F · pH 6–7.5 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: 72–79°Serpae tetra 72–79°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Serpae tetra 6–7.5Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Serpae tetra · 1.75 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

Serpae tetraElectric blue acara
Temperature72–79 °F72–82 °F
pH6–7.56.5–7.5
Adult size1.75 in6.0 in
Minimum tank20 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for serpae tetras

All serpae tetra tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can serpae tetras live with electric blue acaras?

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

What temperature suits both serpae tetras and electric blue acaras?

72–79 °F. Serpae tetras need 72–79 °F, electric blue acaras need 72–82 °F.

What size tank do serpae tetras and electric blue acaras need together?

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