TankmateChecker

Can mollies live with glofish?

Verdict

Yes, with care

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

Molly

Molly72–82°F · pH 7.5–8.5

GloFish tetra

GloFish tetra72–80°F · pH 6–7.5

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 72–80°F.
They use different parts of the tank: mollies the top, glofish 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	GloFish tetra
Temperature	72–82 °F	72–80 °F
pH	7.5–8.5	6–7.5
Adult size	4.0 in	2.5 in
Minimum tank	20 gal	15 gal
Temperament	Peaceful	Semi-aggressive
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 glofish

All glofish tetra tank mates

Questions

Can mollies live with glofish?

Yes, with care. Mollies and glofish 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 glofish?

72–80 °F. Mollies need 72–82 °F, glofish need 72–80 °F.

What size tank do mollies and glofish need together?

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