Can blood parrots live with silver dollars?

Verdict
Yes

Yes. Blood parrots and silver dollars make a good pair. Both are fine at 76–80°F. Plan on at least 75 gal.

Blood parrotBlood parrot76–80°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: 76–80°Blood parrot 76–80°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7Blood parrot 6.5–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Blood parrot · 8 inSilver dollar · 6 in0"1"2"3"4"5"6"7"8"
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

Blood parrotSilver dollar
Temperature76–80 °F75–82 °F
pH6.5–7.55–7
Adult size8.0 in6.0 in
Minimum tank55 gal75 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupAlone or in pairsGroups of 5+
DietOmnivoreHerbivore

Better tank mates for blood parrots

All blood parrot tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can blood parrots live with silver dollars?

Yes. Blood parrots and silver dollars make a good pair. Both are fine at 76–80°F. Plan on at least 75 gal.

What temperature suits both blood parrots and silver dollars?

76–80 °F. Blood parrots need 76–80 °F, silver dollars need 75–82 °F.

What size tank do blood parrots and silver dollars need together?

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