Can discus live with lemon tetras?

Verdict
Yes, with care

Yes, with care. Discus and lemon tetras can share a tank, but watch one thing. They only share 82°F. Keep the heater set there and steady.

DiscusDiscus82–88°F · pH 5.5–7 Lemon tetraLemon tetra72–82°F · pH 5.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 82°Discus 82–88°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 5.5–7Discus 5.5–7Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inLemon tetra · 2 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

DiscusLemon tetra
Temperature82–88 °F72–82 °F
pH5.5–75.5–7.5
Adult size6.0 in2.0 in
Minimum tank55 gal15 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can discus live with lemon tetras?

Yes, with care. Discus and lemon tetras can share a tank, but watch one thing. They only share 82°F. Keep the heater set there and steady.

What temperature suits both discus and lemon tetras?

82–82 °F. Discus need 82–88 °F, lemon tetras need 72–82 °F.

What size tank do discus and lemon tetras need together?

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