Can pictus catfish live with silver dollars?

Verdict
Yes

Yes, pictus catfish and silver dollars can live together. Both are fine at 75–79°F. Plan on at least 75 gal.

Pictus catfishPictus catfish72–79°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: 75–79°Pictus catfish 72–79°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6–7Pictus catfish 6–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Pictus catfish · 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

Pictus catfishSilver dollar
Temperature72–79 °F75–82 °F
pH6–7.55–7
Adult size5.0 in6.0 in
Minimum tank55 gal75 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupGroups of 3+Groups of 5+
DietCarnivoreHerbivore

Better tank mates for pictus catfish

All pictus catfish tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can pictus catfish live with silver dollars?

Yes, pictus catfish and silver dollars can live together. Both are fine at 75–79°F. Plan on at least 75 gal.

What temperature suits both pictus catfish and silver dollars?

75–79 °F. Pictus catfish need 72–79 °F, silver dollars need 75–82 °F.

What size tank do pictus catfish and silver dollars need together?

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