Can upside down catfish live with dojo loaches?

Verdict
Yes

Yes. Upside down catfish and dojo loaches make a good pair. Both are fine at 72–77°F. Plan on at least 55 gal.

Upside down catfishUpside down catfish72–79°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°Upside down catfish 72–79°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Upside down catfish 6–7.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Upside down catfish · 4 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

Upside down catfishDojo loach
Temperature72–79 °F59–77 °F
pH6–7.56.5–8
Adult size4.0 in6.0 in
Minimum tank30 gal55 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupGroups of 3+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for upside down catfish

All upside down catfish tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can upside down catfish live with dojo loaches?

Yes. Upside down catfish and dojo loaches make a good pair. Both are fine at 72–77°F. Plan on at least 55 gal.

What temperature suits both upside down catfish and dojo loaches?

72–77 °F. Upside down catfish need 72–79 °F, dojo loaches need 59–77 °F.

What size tank do upside down catfish and dojo loaches need together?

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