Can discus live with glowlight tetras?

Verdict
No

No. Discus and glowlight tetras should not share a tank. No shared temperature. Discus need 82–88°F, glowlight tetras need 74–80°F.

DiscusDiscus82–88°F · pH 5.5–7 Glowlight tetraGlowlight tetra74–80°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°Glowlight tetra 74–80°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inGlowlight tetra · 1.5 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

DiscusGlowlight tetra
Temperature82–88 °F74–80 °F
pH5.5–76–7.5
Adult size6.0 in1.5 in
Minimum tank55 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can discus live with glowlight tetras?

No. Discus and glowlight tetras should not share a tank. No shared temperature. Discus need 82–88°F, glowlight tetras need 74–80°F.

What temperature suits both discus and glowlight tetras?

None. Discus need 82–88 °F and glowlight tetras need 74–80 °F, so the ranges do not meet.

What size tank do discus and glowlight tetras need together?

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