Can neon tetras live with mollies?

Verdict
Yes, with care

Yes, with care. Neon tetras and mollies can share a tank, but watch one thing. Different water: neon tetras want pH 6–7, mollies want pH 7.5–8.5.

Neon tetraNeon tetra72–79°F · pH 6–7 MollyMolly72–82°F · pH 7.5–8.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Neon tetra 72–79°Molly 72–82°
The green band is the temperature range both can live in.
456789Neon tetra 6–7Molly 7.5–8.5
No pH suits both. One would live in the wrong water all the time.

Size to scale

Neon tetra · 1.5 inMolly · 4 in0"1"2"3"4"5"6"
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

Neon tetraMolly
Temperature72–79 °F72–82 °F
pH6–77.5–8.5
Adult size1.5 in4.0 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleTop
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for neon tetras

All neon tetra tank mates

Better tank mates for mollies

All molly tank mates

Questions

Can neon tetras live with mollies?

Yes, with care. Neon tetras and mollies can share a tank, but watch one thing. Different water: neon tetras want pH 6–7, mollies want pH 7.5–8.5.

What temperature suits both neon tetras and mollies?

72–79 °F. Neon tetras need 72–79 °F, mollies need 72–82 °F.

What size tank do neon tetras and mollies need together?

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