Can pencilfish live with pygmy corys?

Verdict
Yes

Yes, pencilfish and pygmy corys can live together. Both are fine at 75–79°F. Plan on at least 15 gal.

PencilfishPencilfish75–82°F · pH 5–7.5 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: 75–79°Pencilfish 75–82°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Pencilfish 5–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Pencilfish · 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

PencilfishPygmy cory
Temperature75–82 °F72–79 °F
pH5–7.56–7.5
Adult size2.0 in1.0 in
Minimum tank15 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for pencilfish

All pencilfish tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can pencilfish live with pygmy corys?

Yes, pencilfish and pygmy corys can live together. Both are fine at 75–79°F. Plan on at least 15 gal.

What temperature suits both pencilfish and pygmy corys?

75–79 °F. Pencilfish need 75–82 °F, pygmy corys need 72–79 °F.

What size tank do pencilfish and pygmy corys need together?

At least 15 gal, set by the pencilfish. Add space for each extra fish.