Can lemon tetras live with pygmy corys?

Verdict
Yes

Yes. Lemon tetras and pygmy corys make a good pair. Both are fine at 72–79°F. Plan on at least 15 gal.

Lemon tetraLemon tetra72–82°F · pH 5.5–7.5 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: 72–79°Lemon tetra 72–82°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Lemon tetra 5.5–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Lemon tetra · 2 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

Lemon tetraPygmy cory
Temperature72–82 °F72–79 °F
pH5.5–7.56–7.5
Adult size2.0 in1.0 in
Minimum tank15 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for lemon tetras

All lemon tetra tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can lemon tetras live with pygmy corys?

Yes. Lemon tetras and pygmy corys make a good pair. Both are fine at 72–79°F. Plan on at least 15 gal.

What temperature suits both lemon tetras and pygmy corys?

72–79 °F. Lemon tetras need 72–82 °F, pygmy corys need 72–79 °F.

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

At least 15 gal, set by the lemon tetra. Add space for each extra fish.