Can corydoras live with ember tetras?

Verdict
Yes

Yes. Corydoras and ember tetras get along in the same tank. Both are fine at 73–79°F. Plan on at least 20 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 Ember tetraEmber tetra73–84°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Corydoras 72–79°Ember tetra 73–84°
The green band is the temperature range both can live in.
456789Both: 6–7Corydoras 6–7.8Ember tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Corydoras · 2.5 inEmber tetra · 0.8 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

CorydorasEmber tetra
Temperature72–79 °F73–84 °F
pH6–7.85.5–7
Adult size2.5 in0.8 in
Minimum tank20 gal5 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for ember tetras

All ember tetra tank mates

Questions

Can corydoras live with ember tetras?

Yes. Corydoras and ember tetras get along in the same tank. Both are fine at 73–79°F. Plan on at least 20 gal.

What temperature suits both corydoras and ember tetras?

73–79 °F. Corydoras need 72–79 °F, ember tetras need 73–84 °F.

What size tank do corydoras and ember tetras need together?

At least 20 gal, set by the corydoras. Add space for each extra fish.