Can flowerhorns live with glofish?

Verdict
No

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

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 80°Flowerhorn 80–89°GloFish tetra 72–80°
The green band is the temperature range both can live in.
456789Both: 7–7.5Flowerhorn 7–8GloFish tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Flowerhorn · 12 inGloFish tetra · 2.5 in0"2"4"6"8"10"12"
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

FlowerhornGloFish tetra
Temperature80–89 °F72–80 °F
pH7–86–7.5
Adult size12.0 in2.5 in
Minimum tank75 gal15 gal
TemperamentAggressiveSemi-aggressive
Swims atMiddleMiddle
GroupOne per tankGroups of 6+
DietCarnivoreOmnivore

Better tank mates for glofish

All glofish tetra tank mates

Questions

Can flowerhorns live with glofish?

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

What temperature suits both flowerhorns and glofish?

80–80 °F. Flowerhorns need 80–89 °F, glofish need 72–80 °F.

What size tank do flowerhorns and glofish need together?

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