Can koi live with dojo loaches?

Verdict
Yes, with care

Yes, with care. Koi and dojo loaches can share a tank, but watch one thing. A grown koi may treat small dojo loaches as food, especially at night.

KoiKoi59–77°F · pH 7–8.5 Dojo loachDojo loach59–77°F · pH 6.5–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 59–77°Koi 59–77°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 7–8Koi 7–8.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Koi · 24 inDojo loach · 6 in0"6"12"18"24"
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

KoiDojo loach
Temperature59–77 °F59–77 °F
pH7–8.56.5–8
Adult size24.0 in6.0 in
Minimum tankPond55 gal
TemperamentPeacefulPeaceful
Swims atAll levelsBottom
GroupGroups of 3+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for koi

All koi tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can koi live with dojo loaches?

Yes, with care. Koi and dojo loaches can share a tank, but watch one thing. A grown koi may treat small dojo loaches as food, especially at night.

What temperature suits both koi and dojo loaches?

59–77 °F. Koi need 59–77 °F, dojo loaches need 59–77 °F.

What size tank do koi and dojo loaches need together?

A pond. Koi outgrow indoor tanks.