Can discus live with black skirt tetras?

Verdict
No

No. Discus and black skirt tetras should not share a tank. No shared temperature. Discus need 82–88°F, black skirt tetras need 70–80°F.

DiscusDiscus82–88°F · pH 5.5–7 Black skirt tetraBlack skirt tetra70–80°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°Black skirt tetra 70–80°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inBlack skirt 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

DiscusBlack skirt tetra
Temperature82–88 °F70–80 °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 black skirt tetras

All black skirt tetra tank mates

Questions

Can discus live with black skirt tetras?

No. Discus and black skirt tetras should not share a tank. No shared temperature. Discus need 82–88°F, black skirt tetras need 70–80°F.

What temperature suits both discus and black skirt tetras?

None. Discus need 82–88 °F and black skirt tetras need 70–80 °F, so the ranges do not meet.

What size tank do discus and black skirt tetras need together?

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