Can serpae tetras live with endlers?

Verdict
Yes

Yes, serpae tetras and endlers can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

Serpae tetraSerpae tetra72–79°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: 72–79°Serpae tetra 72–79°Endler's livebearer 72–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Serpae tetra 6–7.5Endler's livebearer 7–8
The green band is the pH both tolerate.

Size to scale

Serpae tetra · 1.75 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

Serpae tetraEndler's livebearer
Temperature72–79 °F72–82 °F
pH6–7.57–8
Adult size1.75 in1.0 in
Minimum tank20 gal5 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleTop
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for serpae tetras

All serpae tetra tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can serpae tetras live with endlers?

Yes, serpae tetras and endlers can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both serpae tetras and endlers?

72–79 °F. Serpae tetras need 72–79 °F, endlers need 72–82 °F.

What size tank do serpae tetras and endlers need together?

At least 20 gal, set by the serpae tetra. Add space for each extra fish.