Can corydoras live with silver dollars?

Verdict
Yes

Yes. Corydoras and silver dollars make a good pair. Both are fine at 75–79°F. Plan on at least 75 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Corydoras 72–79°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6–7Corydoras 6–7.8Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Corydoras · 2.5 inSilver dollar · 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

CorydorasSilver dollar
Temperature72–79 °F75–82 °F
pH6–7.85–7
Adult size2.5 in6.0 in
Minimum tank20 gal75 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 5+
DietOmnivoreHerbivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can corydoras live with silver dollars?

Yes. Corydoras and silver dollars make a good pair. Both are fine at 75–79°F. Plan on at least 75 gal.

What temperature suits both corydoras and silver dollars?

75–79 °F. Corydoras need 72–79 °F, silver dollars need 75–82 °F.

What size tank do corydoras and silver dollars need together?

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