Can platies live with pygmy corys?

Verdict
Yes

Yes, platies and pygmy corys can live together. Both are fine at 72–79°F. Plan on at least 10 gal.

PlatyPlaty70–80°F · pH 7–8.2 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°Platy 70–80°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 7–7.5Platy 7–8.2Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 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

PlatyPygmy cory
Temperature70–80 °F72–79 °F
pH7–8.26–7.5
Adult size2.5 in1.0 in
Minimum tank10 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can platies live with pygmy corys?

Yes, platies and pygmy corys can live together. Both are fine at 72–79°F. Plan on at least 10 gal.

What temperature suits both platies and pygmy corys?

72–79 °F. Platies need 70–80 °F, pygmy corys need 72–79 °F.

What size tank do platies and pygmy corys need together?

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