Can corydoras live with lemon tetras?

Verdict
Yes

Yes. Corydoras and lemon tetras make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 Lemon tetraLemon tetra72–82°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Corydoras 72–79°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Corydoras 6–7.8Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Corydoras · 2.5 inLemon tetra · 2 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

CorydorasLemon tetra
Temperature72–79 °F72–82 °F
pH6–7.85.5–7.5
Adult size2.5 in2.0 in
Minimum tank20 gal15 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can corydoras live with lemon tetras?

Yes. Corydoras and lemon tetras make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both corydoras and lemon tetras?

72–79 °F. Corydoras need 72–79 °F, lemon tetras need 72–82 °F.

What size tank do corydoras and lemon tetras need together?

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