Can glass catfish live with mollies?

Verdict

Yes, with care

Yes, with care. Glass catfish 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.

Glass catfish75–80°F · pH 6.5–7.5

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 75–80°F.
They use different parts of the tank: glass catfish the mid, 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

	Glass catfish	Molly
Temperature	75–80 °F	72–82 °F
pH	6.5–7.5	7.5–8.5
Adult size	3.0 in	4.0 in
Minimum tank	30 gal	20 gal
Temperament	Peaceful	Peaceful
Swims at	Middle	Top
Group	Groups of 6+	Groups of 3+
Diet	Carnivore	Omnivore

Better tank mates for glass catfish

All glass catfish tank mates

Better tank mates for mollies

All molly tank mates

Questions

Can glass catfish live with mollies?

Yes, with care. Glass catfish 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 glass catfish and mollies?

75–80 °F. Glass catfish need 75–80 °F, mollies need 72–82 °F.

What size tank do glass catfish and mollies need together?

At least 30 gal, set by the glass catfish. Add space for each extra fish.