Can discus live with serpae tetras?

Verdict
No

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

DiscusDiscus82–88°F · pH 5.5–7 Serpae tetraSerpae tetra72–79°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°Serpae tetra 72–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Serpae tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inSerpae tetra · 1.75 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

DiscusSerpae tetra
Temperature82–88 °F72–79 °F
pH5.5–76–7.5
Adult size6.0 in1.75 in
Minimum tank55 gal20 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 serpae tetras

All serpae tetra tank mates

Questions

Can discus live with serpae tetras?

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

What temperature suits both discus and serpae tetras?

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

What size tank do discus and serpae tetras need together?

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