Can pearl gouramis live with silver dollars?

Verdict
Yes

Yes. Pearl gouramis and silver dollars get along in the same tank. Both are fine at 77–82°F. Plan on at least 75 gal.

Pearl gouramiPearl gourami77–82°F · pH 6–7.5 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 77–82°Pearl gourami 77–82°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6–7Pearl gourami 6–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Pearl gourami · 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

Pearl gouramiSilver dollar
Temperature77–82 °F75–82 °F
pH6–7.55–7
Adult size5.0 in6.0 in
Minimum tank30 gal75 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 5+
DietOmnivoreHerbivore

Better tank mates for pearl gouramis

All pearl gourami tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can pearl gouramis live with silver dollars?

Yes. Pearl gouramis and silver dollars get along in the same tank. Both are fine at 77–82°F. Plan on at least 75 gal.

What temperature suits both pearl gouramis and silver dollars?

77–82 °F. Pearl gouramis need 77–82 °F, silver dollars need 75–82 °F.

What size tank do pearl gouramis and silver dollars need together?

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