Can discus live with glofish?

Verdict
No

No. Discus and glofish should not share a tank. No shared temperature. Discus need 82–88°F, glofish need 72–80°F.

DiscusDiscus82–88°F · pH 5.5–7 GloFish tetraGloFish tetra72–80°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°GloFish tetra 72–80°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7GloFish tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inGloFish tetra · 2.5 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

DiscusGloFish tetra
Temperature82–88 °F72–80 °F
pH5.5–76–7.5
Adult size6.0 in2.5 in
Minimum tank55 gal15 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for glofish

All glofish tetra tank mates

Questions

Can discus live with glofish?

No. Discus and glofish should not share a tank. No shared temperature. Discus need 82–88°F, glofish need 72–80°F.

What temperature suits both discus and glofish?

None. Discus need 82–88 °F and glofish need 72–80 °F, so the ranges do not meet.

What size tank do discus and glofish need together?

At least 55 gal, set by the discus. Add space for each extra fish.