Can mollies live with dojo loaches?

Verdict
Yes

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

MollyMolly72–82°F · pH 7.5–8.5 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°Molly 72–82°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 7.5–8Molly 7.5–8.5Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Molly · 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

MollyDojo loach
Temperature72–82 °F59–77 °F
pH7.5–8.56.5–8
Adult size4.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 3+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for mollies

All molly tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can mollies live with dojo loaches?

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

What temperature suits both mollies and dojo loaches?

72–77 °F. Mollies need 72–82 °F, dojo loaches need 59–77 °F.

What size tank do mollies and dojo loaches need together?

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