Can serpae tetras live with dojo loaches?

Verdict
Yes

Yes. Serpae tetras and dojo loaches get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

Serpae tetraSerpae tetra72–79°F · pH 6–7.5 Dojo loachDojo loach59–77°F · pH 6.5–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Serpae tetra 72–79°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Serpae tetra 6–7.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Serpae tetra · 1.75 inDojo loach · 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 tetraDojo loach
Temperature72–79 °F59–77 °F
pH6–7.56.5–8
Adult size1.75 in6.0 in
Minimum tank20 gal55 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for serpae tetras

All serpae tetra tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can serpae tetras live with dojo loaches?

Yes. Serpae tetras and dojo loaches get along in the same tank. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both serpae tetras and dojo loaches?

72–77 °F. Serpae tetras need 72–79 °F, dojo loaches need 59–77 °F.

What size tank do serpae tetras and dojo loaches need together?

At least 55 gal, set by the dojo loach. Add space for each extra fish.