Can severums live with dojo loaches?

Verdict
Yes

Yes. Severums and dojo loaches get along in the same tank. Both are fine at 74–77°F. Plan on at least 55 gal.

SeverumSeverum74–84°F · pH 6–7 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: 74–77°Severum 74–84°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7Severum 6–7Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Severum · 8 inDojo loach · 6 in0"1"2"3"4"5"6"7"8"
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

SeverumDojo loach
Temperature74–84 °F59–77 °F
pH6–76.5–8
Adult size8.0 in6.0 in
Minimum tank55 gal55 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupAlone or in pairsGroups of 3+
DietOmnivoreOmnivore

Better tank mates for severums

All severum tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can severums live with dojo loaches?

Yes. Severums and dojo loaches get along in the same tank. Both are fine at 74–77°F. Plan on at least 55 gal.

What temperature suits both severums and dojo loaches?

74–77 °F. Severums need 74–84 °F, dojo loaches need 59–77 °F.

What size tank do severums and dojo loaches need together?

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