Can silver dollars live with dojo loaches?

Verdict
Yes

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

Silver dollarSilver dollar75–82°F · pH 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°Silver dollar 75–82°Dojo loach 59–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7Silver dollar 5–7Dojo loach 6.5–8
The green band is the pH both tolerate.

Size to scale

Silver dollar · 6 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

Silver dollarDojo loach
Temperature75–82 °F59–77 °F
pH5–76.5–8
Adult size6.0 in6.0 in
Minimum tank75 gal55 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 5+Groups of 3+
DietHerbivoreOmnivore

Better tank mates for silver dollars

All silver dollar tank mates

Better tank mates for dojo loaches

All dojo loach tank mates

Questions

Can silver dollars live with dojo loaches?

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

What temperature suits both silver dollars and dojo loaches?

75–77 °F. Silver dollars need 75–82 °F, dojo loaches need 59–77 °F.

What size tank do silver dollars and dojo loaches need together?

At least 75 gal, set by the silver dollar. Add space for each extra fish.