Can mollies live with siamese algae eaters?

Verdict

Yes, with care

Yes, with care. Mollies and siamese algae eaters can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.5.

Molly72–82°F · pH 7.5–8.5

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

What to watch

Watch outWater chemistry is a squeeze. The only pH that suits both is around 7.5.

What works

Both are fine at 75–79°F.
They use different parts of the tank: mollies the top, siamese algae eaters the bottom.

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

	Molly	Siamese algae eater
Temperature	72–82 °F	75–79 °F
pH	7.5–8.5	6.5–7.5
Adult size	4.0 in	6.0 in
Minimum tank	20 gal	30 gal
Temperament	Peaceful	Peaceful
Swims at	Top	Bottom
Group	Groups of 3+	Alone or in pairs
Diet	Omnivore	Herbivore

Better tank mates for mollies

All molly tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can mollies live with siamese algae eaters?

Yes, with care. Mollies and siamese algae eaters can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.5.

What temperature suits both mollies and siamese algae eaters?

75–79 °F. Mollies need 72–82 °F, siamese algae eaters need 75–79 °F.

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

At least 30 gal, set by the siamese algae eater. Add space for each extra fish.