Can severums live with silver dollars?

Verdict
Yes

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

SeverumSeverum74–84°F · pH 6–7 Silver dollarSilver dollar75–82°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Severum 74–84°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6–7Severum 6–7Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Severum · 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

SeverumSilver dollar
Temperature74–84 °F75–82 °F
pH6–75–7
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 severums

All severum tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can severums live with silver dollars?

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

What temperature suits both severums and silver dollars?

75–82 °F. Severums need 74–84 °F, silver dollars need 75–82 °F.

What size tank do severums and silver dollars need together?

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