Can ember tetras live with pygmy corys?

Verdict
Yes

Yes. Ember tetras and pygmy corys make a good pair. Both are fine at 73–79°F. Plan on at least 10 gal.

Ember tetraEmber tetra73–84°F · pH 5.5–7 Pygmy coryPygmy cory72–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Ember tetra 73–84°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7Ember tetra 5.5–7Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Ember tetra · 0.8 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

Ember tetraPygmy cory
Temperature73–84 °F72–79 °F
pH5.5–76–7.5
Adult size0.8 in1.0 in
Minimum tank5 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for ember tetras

All ember tetra tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can ember tetras live with pygmy corys?

Yes. Ember tetras and pygmy corys make a good pair. Both are fine at 73–79°F. Plan on at least 10 gal.

What temperature suits both ember tetras and pygmy corys?

73–79 °F. Ember tetras need 73–84 °F, pygmy corys need 72–79 °F.

What size tank do ember tetras and pygmy corys need together?

At least 10 gal, set by the pygmy cory. Add space for each extra fish.