Can discus live with corydoras?

Verdict
No

No. Discus and corydoras should not share a tank. No shared temperature. Discus need 82–88°F, corydoras need 72–79°F.

DiscusDiscus82–88°F · pH 5.5–7 CorydorasCorydoras72–79°F · pH 6–7.8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Corydoras 72–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Corydoras 6–7.8
The green band is the pH both tolerate.

Size to scale

Discus · 6 inCorydoras · 2.5 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

DiscusCorydoras
Temperature82–88 °F72–79 °F
pH5.5–76–7.8
Adult size6.0 in2.5 in
Minimum tank55 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for corydoras

All corydoras tank mates

Questions

Can discus live with corydoras?

No. Discus and corydoras should not share a tank. No shared temperature. Discus need 82–88°F, corydoras need 72–79°F.

What temperature suits both discus and corydoras?

None. Discus need 82–88 °F and corydoras need 72–79 °F, so the ranges do not meet.

What size tank do discus and corydoras need together?

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