Can siamese algae eaters live with silver dollars?

Verdict
Yes

Yes. Siamese algae eaters and silver dollars get along in the same tank. Both are fine at 75–79°F. Plan on at least 75 gal.

Siamese algae eaterSiamese algae eater75–79°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: 75–79°Siamese algae eater 75–79°Silver dollar 75–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7Siamese algae eater 6.5–7.5Silver dollar 5–7
The green band is the pH both tolerate.

Size to scale

Siamese algae eater · 6 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

Siamese algae eaterSilver dollar
Temperature75–79 °F75–82 °F
pH6.5–7.55–7
Adult size6.0 in6.0 in
Minimum tank30 gal75 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 5+
DietHerbivoreHerbivore

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Better tank mates for silver dollars

All silver dollar tank mates

Questions

Can siamese algae eaters live with silver dollars?

Yes. Siamese algae eaters and silver dollars get along in the same tank. Both are fine at 75–79°F. Plan on at least 75 gal.

What temperature suits both siamese algae eaters and silver dollars?

75–79 °F. Siamese algae eaters need 75–79 °F, silver dollars need 75–82 °F.

What size tank do siamese algae eaters and silver dollars need together?

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