Can discus live with siamese algae eaters?

Verdict
No

No. Discus and siamese algae eaters should not share a tank. No shared temperature. Discus need 82–88°F, siamese algae eaters need 75–79°F.

DiscusDiscus82–88°F · pH 5.5–7 Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Siamese algae eater 75–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6.5–7Discus 5.5–7Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inSiamese algae eater · 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

DiscusSiamese algae eater
Temperature82–88 °F75–79 °F
pH5.5–76.5–7.5
Adult size6.0 in6.0 in
Minimum tank55 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 5+Alone or in pairs
DietCarnivoreHerbivore

Better tank mates for discus

All discus tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can discus live with siamese algae eaters?

No. Discus and siamese algae eaters should not share a tank. No shared temperature. Discus need 82–88°F, siamese algae eaters need 75–79°F.

What temperature suits both discus and siamese algae eaters?

None. Discus need 82–88 °F and siamese algae eaters need 75–79 °F, so the ranges do not meet.

What size tank do discus and siamese algae eaters need together?

At least 55 gal, set by the discus. Add space for each extra fish.