Can corydoras live with congo tetras?

Verdict
Yes

Yes. Corydoras and congo tetras make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

CorydorasCorydoras72–79°F · pH 6–7.8 Congo tetraCongo tetra73–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Corydoras 72–79°Congo tetra 73–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Corydoras 6–7.8Congo tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Corydoras · 2.5 inCongo tetra · 3 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

CorydorasCongo tetra
Temperature72–79 °F73–82 °F
pH6–7.86–7.5
Adult size2.5 in3.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for corydoras

All corydoras tank mates

Better tank mates for congo tetras

All congo tetra tank mates

Questions

Can corydoras live with congo tetras?

Yes. Corydoras and congo tetras make a good pair. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both corydoras and congo tetras?

73–79 °F. Corydoras need 72–79 °F, congo tetras need 73–82 °F.

What size tank do corydoras and congo tetras need together?

At least 30 gal, set by the congo tetra. Add space for each extra fish.