Can fancy goldfish live with glofish?

Verdict

No. Fancy goldfish and glofish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); glofish need 72–80°F. They overlap only at 72–74°F, the edge of both ranges.

Fancy goldfish65–74°F · pH 7–8

GloFish tetra72–80°F · pH 6–7.5

What to watch

Deal breakerFancy goldfish are coldwater animals (65–74°F); glofish need 72–80°F. They overlap only at 72–74°F, the edge of both ranges.
Deal breakerGlofish nip fins, and the long fins of fancy goldfish are an easy target.

What works

pH 7–7.5 suits both.

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

	Fancy goldfish	GloFish tetra
Temperature	65–74 °F	72–80 °F
pH	7–8	6–7.5
Adult size	6.0 in	2.5 in
Minimum tank	30 gal	15 gal
Temperament	Peaceful	Semi-aggressive
Swims at	All levels	Middle
Group	Alone or in pairs	Groups of 6+
Diet	Omnivore	Omnivore

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Better tank mates for glofish

All glofish tetra tank mates

Questions

Can fancy goldfish live with glofish?

No. Fancy goldfish and glofish should not share a tank. Fancy goldfish are coldwater animals (65–74°F); glofish need 72–80°F. They overlap only at 72–74°F, the edge of both ranges.

What temperature suits both fancy goldfish and glofish?

72–74 °F. Fancy goldfish need 65–74 °F, glofish need 72–80 °F.

What size tank do fancy goldfish and glofish need together?

At least 30 gal, set by the fancy goldfish. Add space for each extra fish.