Can flowerhorns live with rummy nose tetras?

Verdict

No. Flowerhorns and rummy nose tetras should not share a tank. An adult flowerhorn eats fish that fit in its mouth, and at 2 inches rummy nose tetras do.

Flowerhorn80–89°F · pH 7–8

Rummy nose tetra75–84°F · pH 5.5–7

What to watch

Deal breakerAn adult flowerhorn eats fish that fit in its mouth, and at 2 inches rummy nose tetras do.
Deal breakerFlowerhorns are aggressive and will bully peaceful rummy nose tetras.
Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.

What works

Both are fine at 80–84°F.

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	Rummy nose tetra
Temperature	80–89 °F	75–84 °F
pH	7–8	5.5–7
Adult size	12.0 in	2.0 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 rummy nose tetras

All rummy nose tetra tank mates

Questions

Can flowerhorns live with rummy nose tetras?

No. Flowerhorns and rummy nose tetras should not share a tank. An adult flowerhorn eats fish that fit in its mouth, and at 2 inches rummy nose tetras do.

What temperature suits both flowerhorns and rummy nose tetras?

80–84 °F. Flowerhorns need 80–89 °F, rummy nose tetras need 75–84 °F.

What size tank do flowerhorns and rummy nose tetras need together?

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