Can kuhli loaches live with electric blue acaras?

Verdict
Yes

Yes. Kuhli loaches and electric blue acaras get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

Kuhli loachKuhli loach75–86°F · pH 5.5–7 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°Kuhli loach 75–86°Electric blue acara 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7Kuhli loach 5.5–7Electric blue acara 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Kuhli loach · 3.5 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

Kuhli loachElectric blue acara
Temperature75–86 °F72–82 °F
pH5.5–76.5–7.5
Adult size3.5 in6.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for kuhli loaches

All kuhli loach tank mates

Better tank mates for electric blue acaras

All electric blue acara tank mates

Questions

Can kuhli loaches live with electric blue acaras?

Yes. Kuhli loaches and electric blue acaras get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both kuhli loaches and electric blue acaras?

75–82 °F. Kuhli loaches need 75–86 °F, electric blue acaras need 72–82 °F.

What size tank do kuhli loaches and electric blue acaras need together?

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