Can rams live with silver dollars?

Verdict
Yes

Yes. Rams and silver dollars make a good pair. Both are fine at 80–82°F. Plan on at least 75 gal.

German blue ramGerman blue ram80–86°F · pH 5–7 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–82°German blue ram 80–86°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 5–7German blue ram 5–7Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

German blue ram · 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

German blue ramSilver dollar
Temperature80–86 °F75–82 °F
pH5–75–7
Adult size2.5 in6.0 in
Minimum tank20 gal75 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 5+
DietOmnivoreHerbivore

Better tank mates for rams

All german blue ram tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can rams live with silver dollars?

Yes. Rams and silver dollars make a good pair. Both are fine at 80–82°F. Plan on at least 75 gal.

What temperature suits both rams and silver dollars?

80–82 °F. Rams need 80–86 °F, silver dollars need 75–82 °F.

What size tank do rams and silver dollars need together?

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