Can rummy nose tetras live with dojo loaches?

Verdict
Yes

Yes. Rummy nose tetras and dojo loaches get along in the same tank. Both are fine at 75–77°F. Plan on at least 55 gal.

Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7 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: 75–77°Rummy nose tetra 75–84°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7Rummy nose tetra 5.5–7Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Rummy nose tetra · 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

Rummy nose tetraDojo loach
Temperature75–84 °F59–77 °F
pH5.5–76.5–8
Adult size2.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can rummy nose tetras live with dojo loaches?

Yes. Rummy nose tetras and dojo loaches get along in the same tank. Both are fine at 75–77°F. Plan on at least 55 gal.

What temperature suits both rummy nose tetras and dojo loaches?

75–77 °F. Rummy nose tetras need 75–84 °F, dojo loaches need 59–77 °F.

What size tank do rummy nose tetras and dojo loaches need together?

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