Can harlequin rasboras live with pygmy corys?

Verdict
Yes

Yes. Harlequin rasboras and pygmy corys get along in the same tank. Both are fine at 72–79°F. Plan on at least 10 gal.

Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5 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°Harlequin rasbora 72–80°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Harlequin rasbora 6–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Harlequin rasbora · 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

Harlequin rasboraPygmy cory
Temperature72–80 °F72–79 °F
pH6–7.56–7.5
Adult size2.0 in1.0 in
Minimum tank10 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can harlequin rasboras live with pygmy corys?

Yes. Harlequin rasboras and pygmy corys get along in the same tank. Both are fine at 72–79°F. Plan on at least 10 gal.

What temperature suits both harlequin rasboras and pygmy corys?

72–79 °F. Harlequin rasboras need 72–80 °F, pygmy corys need 72–79 °F.

What size tank do harlequin rasboras and pygmy corys need together?

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