Can bristlenose plecos live with silver dollars?

Verdict
Yes

Yes. Bristlenose plecos and silver dollars make a good pair. Both are fine at 75–81°F. Plan on at least 75 gal.

Bristlenose plecoBristlenose pleco73–81°F · pH 6.5–7.5 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–81°Bristlenose pleco 73–81°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7Bristlenose pleco 6.5–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Bristlenose pleco · 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

Bristlenose plecoSilver dollar
Temperature73–81 °F75–82 °F
pH6.5–7.55–7
Adult size5.0 in6.0 in
Minimum tank30 gal75 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 5+
DietHerbivoreHerbivore

Better tank mates for bristlenose plecos

All bristlenose pleco tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can bristlenose plecos live with silver dollars?

Yes. Bristlenose plecos and silver dollars make a good pair. Both are fine at 75–81°F. Plan on at least 75 gal.

What temperature suits both bristlenose plecos and silver dollars?

75–81 °F. Bristlenose plecos need 73–81 °F, silver dollars need 75–82 °F.

What size tank do bristlenose plecos and silver dollars need together?

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