Can jack dempseys live with dwarf neon rainbowfish?

Verdict

No. Jack dempseys and dwarf neon rainbowfish should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 2.5 inches dwarf neon rainbowfish do.

Jack Dempsey72–86°F · pH 6.5–7.5

Dwarf neon rainbowfish75–82°F · pH 6.5–7.5

What to watch

Deal breakerAn adult jack dempsey eats fish that fit in its mouth, and at 2.5 inches dwarf neon rainbowfish do.
Deal breakerJack dempseys are aggressive and will bully peaceful dwarf neon rainbowfish.

What works

Both are fine at 75–82°F.
pH 6.5–7.5 suits both.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

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 Dempsey	Dwarf neon rainbowfish
Temperature	72–86 °F	75–82 °F
pH	6.5–7.5	6.5–7.5
Adult size	10.0 in	2.5 in
Minimum tank	55 gal	20 gal
Temperament	Aggressive	Peaceful
Swims at	Middle	Middle
Group	Alone or in pairs	Groups of 6+
Diet	Carnivore	Omnivore

Better tank mates for jack dempseys

CrayfishYes

All jack dempsey tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can jack dempseys live with dwarf neon rainbowfish?

No. Jack dempseys and dwarf neon rainbowfish should not share a tank. An adult jack dempsey eats fish that fit in its mouth, and at 2.5 inches dwarf neon rainbowfish do.

What temperature suits both jack dempseys and dwarf neon rainbowfish?

75–82 °F. Jack dempseys need 72–86 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do jack dempseys and dwarf neon rainbowfish need together?

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