Can jack dempseys live with pygmy corys?

Verdict
No

No. Jack dempseys and pygmy corys should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 1 inches pygmy corys do.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Jack Dempsey 72–86°Pygmy cory 72–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Jack Dempsey 6.5–7.5Pygmy cory 6–7.5
The green band is the pH both tolerate.

Size to scale

Jack Dempsey · 10 inPygmy cory · 1 in0"2"4"6"8"10"
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

Jack DempseyPygmy cory
Temperature72–86 °F72–79 °F
pH6.5–7.56–7.5
Adult size10.0 in1.0 in
Minimum tank55 gal10 gal
TemperamentAggressivePeaceful
Swims atMiddleMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for jack dempseys

All jack dempsey tank mates

Better tank mates for pygmy corys

All pygmy cory tank mates

Questions

Can jack dempseys live with pygmy corys?

No. Jack dempseys and pygmy corys should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 1 inches pygmy corys do.

What temperature suits both jack dempseys and pygmy corys?

72–79 °F. Jack dempseys need 72–86 °F, pygmy corys need 72–79 °F.

What size tank do jack dempseys and pygmy corys need together?

At least 55 gal, set by the jack dempsey. Add space for each extra fish.