Can mollies live with dwarf neon rainbowfish?

Verdict

Yes, with care

Yes, with care. Mollies and dwarf neon rainbowfish 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

Dwarf neon rainbowfish75–82°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 75–82°F.
They use different parts of the tank: mollies the top, dwarf neon rainbowfish the mid.

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	Dwarf neon rainbowfish
Temperature	72–82 °F	75–82 °F
pH	7.5–8.5	6.5–7.5
Adult size	4.0 in	2.5 in
Minimum tank	20 gal	20 gal
Temperament	Peaceful	Peaceful
Swims at	Top	Middle
Group	Groups of 3+	Groups of 6+
Diet	Omnivore	Omnivore

Better tank mates for mollies

All molly tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can mollies live with dwarf neon rainbowfish?

Yes, with care. Mollies and dwarf neon rainbowfish 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 dwarf neon rainbowfish?

75–82 °F. Mollies need 72–82 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do mollies and dwarf neon rainbowfish need together?

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