Can otocinclus live with dojo loaches?

Verdict
Yes

Yes, otocinclus and dojo loaches can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

OtocinclusOtocinclus72–79°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°Otocinclus 72–79°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Otocinclus 6–7.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Otocinclus · 2 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

OtocinclusDojo loach
Temperature72–79 °F59–77 °F
pH6–7.56.5–8
Adult size2.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupGroups of 6+Groups of 3+
DietHerbivoreOmnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can otocinclus live with dojo loaches?

Yes, otocinclus and dojo loaches can live together. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both otocinclus and dojo loaches?

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

What size tank do otocinclus and dojo loaches need together?

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