Can bolivian rams live with mollies?

Verdict

Yes, with care

Yes, with care. Bolivian rams and mollies can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.5.

Bolivian ram72–79°F · pH 6–7.5

Molly72–82°F · pH 7.5–8.5

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 72–79°F.
They use different parts of the tank: bolivian rams the bottom, mollies the top.

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

	Bolivian ram	Molly
Temperature	72–79 °F	72–82 °F
pH	6–7.5	7.5–8.5
Adult size	3.0 in	4.0 in
Minimum tank	20 gal	20 gal
Temperament	Peaceful	Peaceful
Swims at	Bottom	Top
Group	Alone or in pairs	Groups of 3+
Diet	Omnivore	Omnivore

Better tank mates for bolivian rams

All bolivian ram tank mates

Better tank mates for mollies

All molly tank mates

Questions

Can bolivian rams live with mollies?

Yes, with care. Bolivian rams and mollies 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 bolivian rams and mollies?

72–79 °F. Bolivian rams need 72–79 °F, mollies need 72–82 °F.

What size tank do bolivian rams and mollies need together?

At least 20 gal, set by the bolivian ram. Add space for each extra fish.