Can neon tetras live with discus?

Verdict
No

No. Neon tetras and discus should not share a tank. No shared temperature. Neon tetras need 72–79°F, discus need 82–88°F.

Neon tetraNeon tetra72–79°F · pH 6–7 DiscusDiscus82–88°F · pH 5.5–7

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Neon tetra 72–79°Discus 82–88°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Neon tetra 6–7Discus 5.5–7
The green band is the pH both tolerate.

Size to scale

Neon tetra · 1.5 inDiscus · 6 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

Neon tetraDiscus
Temperature72–79 °F82–88 °F
pH6–75.5–7
Adult size1.5 in6.0 in
Minimum tank10 gal55 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 5+
DietOmnivoreCarnivore

Better tank mates for neon tetras

All neon tetra tank mates

Better tank mates for discus

All discus tank mates

Questions

Can neon tetras live with discus?

No. Neon tetras and discus should not share a tank. No shared temperature. Neon tetras need 72–79°F, discus need 82–88°F.

What temperature suits both neon tetras and discus?

None. Neon tetras need 72–79 °F and discus need 82–88 °F, so the ranges do not meet.

What size tank do neon tetras and discus need together?

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