Can flowerhorns live with dwarf neon rainbowfish?

Verdict

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

Flowerhorn80–89°F · pH 7–8

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

What to watch

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

What works

Both are fine at 80–82°F.
pH 7–7.5 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

	Flowerhorn	Dwarf neon rainbowfish
Temperature	80–89 °F	75–82 °F
pH	7–8	6.5–7.5
Adult size	12.0 in	2.5 in
Minimum tank	75 gal	20 gal
Temperament	Aggressive	Peaceful
Swims at	Middle	Middle
Group	One per tank	Groups of 6+
Diet	Carnivore	Omnivore

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can flowerhorns live with dwarf neon rainbowfish?

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

What temperature suits both flowerhorns and dwarf neon rainbowfish?

80–82 °F. Flowerhorns need 80–89 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do flowerhorns and dwarf neon rainbowfish need together?

At least 75 gal, set by the flowerhorn. Add space for each extra fish.