Can flowerhorns live with glowlight tetras?

Verdict

No. Flowerhorns and glowlight tetras should not share a tank. An adult flowerhorn eats fish that fit in its mouth, and at 1.5 inches glowlight tetras do.

Flowerhorn80–89°F · pH 7–8

Glowlight tetra74–80°F · pH 6–7.5

What to watch

Deal breakerAn adult flowerhorn eats fish that fit in its mouth, and at 1.5 inches glowlight tetras do.
Deal breakerFlowerhorns are aggressive and will bully peaceful glowlight tetras.
Watch outThey only share 80°F. Keep the heater set there and steady.
Watch outFlowerhorns grow to 12 inches and need 75 gallons, far more than a tank set up for glowlight tetras.

What works

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	Glowlight tetra
Temperature	80–89 °F	74–80 °F
pH	7–8	6–7.5
Adult size	12.0 in	1.5 in
Minimum tank	75 gal	10 gal
Temperament	Aggressive	Peaceful
Swims at	Middle	Middle
Group	One per tank	Groups of 6+
Diet	Carnivore	Omnivore

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can flowerhorns live with glowlight tetras?

No. Flowerhorns and glowlight tetras should not share a tank. An adult flowerhorn eats fish that fit in its mouth, and at 1.5 inches glowlight tetras do.

What temperature suits both flowerhorns and glowlight tetras?

80–80 °F. Flowerhorns need 80–89 °F, glowlight tetras need 74–80 °F.

What size tank do flowerhorns and glowlight tetras need together?

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