Can corydoras live with black skirt tetras?

Verdict
Yes

Yes, corydoras and black skirt tetras can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5

Why it works

Water side by side

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

Size to scale

Corydoras · 2.5 inBlack skirt tetra · 2.5 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

CorydorasBlack skirt tetra
Temperature72–79 °F70–80 °F
pH6–7.86–7.5
Adult size2.5 in2.5 in
Minimum tank20 gal15 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can corydoras live with black skirt tetras?

Yes, corydoras and black skirt tetras can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both corydoras and black skirt tetras?

72–79 °F. Corydoras need 72–79 °F, black skirt tetras need 70–80 °F.

What size tank do corydoras and black skirt tetras need together?

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