Can black skirt tetras live with endlers?

Verdict
Yes

Yes, black skirt tetras and endlers can live together. Both are fine at 72–80°F. Plan on at least 15 gal.

Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5 Endler's livebearerEndler's livebearer72–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–80°Black skirt tetra 70–80°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Black skirt tetra 6–7.5Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Black skirt tetra · 2.5 inEndler's livebearer · 1 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

Black skirt tetraEndler's livebearer
Temperature70–80 °F72–82 °F
pH6–7.57–8
Adult size2.5 in1.0 in
Minimum tank15 gal5 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleTop
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can black skirt tetras live with endlers?

Yes, black skirt tetras and endlers can live together. Both are fine at 72–80°F. Plan on at least 15 gal.

What temperature suits both black skirt tetras and endlers?

72–80 °F. Black skirt tetras need 70–80 °F, endlers need 72–82 °F.

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

At least 15 gal, set by the black skirt tetra. Add space for each extra fish.