Can discus live with pygmy corys?

Verdict
No

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

DiscusDiscus82–88°F · pH 5.5–7 Pygmy coryPygmy cory72–79°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Pygmy cory 72–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inPygmy cory · 1 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

DiscusPygmy cory
Temperature82–88 °F72–79 °F
pH5.5–76–7.5
Adult size6.0 in1.0 in
Minimum tank55 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can discus live with pygmy corys?

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

What temperature suits both discus and pygmy corys?

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

What size tank do discus and pygmy corys need together?

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