TankmateChecker

Can flowerhorns live with siamese algae eaters?

Verdict

No

No. Flowerhorns and siamese algae eaters should not share a tank. No shared temperature. Flowerhorns need 80–89°F, siamese algae eaters need 75–79°F.

Flowerhorn

Flowerhorn80–89°F · pH 7–8

Siamese algae eater

Siamese algae eater75–79°F · pH 6.5–7.5

What to watch

Deal breakerNo shared temperature. Flowerhorns need 80–89°F, siamese algae eaters need 75–79°F.
Deal breakerFlowerhorns are aggressive and will bully peaceful siamese algae eaters.

What works

pH 7–7.5 suits both.
They use different parts of the tank: flowerhorns the mid, siamese algae eaters the bottom.

Water side by side

The ranges do not meet, so one of them would always be too warm or too cold.

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	Siamese algae eater
Temperature	80–89 °F	75–79 °F
pH	7–8	6.5–7.5
Adult size	12.0 in	6.0 in
Minimum tank	75 gal	30 gal
Temperament	Aggressive	Peaceful
Swims at	Middle	Bottom
Group	One per tank	Alone or in pairs
Diet	Carnivore	Herbivore

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can flowerhorns live with siamese algae eaters?

No. Flowerhorns and siamese algae eaters should not share a tank. No shared temperature. Flowerhorns need 80–89°F, siamese algae eaters need 75–79°F.

What temperature suits both flowerhorns and siamese algae eaters?

None. Flowerhorns need 80–89 °F and siamese algae eaters need 75–79 °F, so the ranges do not meet.

What size tank do flowerhorns and siamese algae eaters need together?

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