Can serpae tetras live with glowlight tetras?

Verdict
Yes

Yes. Serpae tetras and glowlight tetras get along in the same tank. Both are fine at 74–79°F. Plan on at least 20 gal.

Serpae tetraSerpae tetra72–79°F · pH 6–7.5 Glowlight tetraGlowlight tetra74–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–79°Serpae tetra 72–79°Glowlight tetra 74–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Serpae tetra 6–7.5Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Serpae tetra · 1.75 inGlowlight tetra · 1.5 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

Serpae tetraGlowlight tetra
Temperature72–79 °F74–80 °F
pH6–7.56–7.5
Adult size1.75 in1.5 in
Minimum tank20 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for serpae tetras

All serpae tetra tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can serpae tetras live with glowlight tetras?

Yes. Serpae tetras and glowlight tetras get along in the same tank. Both are fine at 74–79°F. Plan on at least 20 gal.

What temperature suits both serpae tetras and glowlight tetras?

74–79 °F. Serpae tetras need 72–79 °F, glowlight tetras need 74–80 °F.

What size tank do serpae tetras and glowlight tetras need together?

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