Can cardinal tetras live with glowlight tetras?

Verdict
Yes

Yes. Cardinal tetras and glowlight tetras make a good pair. Both are fine at 76–80°F. Plan on at least 20 gal.

Cardinal tetraCardinal tetra76–84°F · pH 4.6–7 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: 76–80°Cardinal tetra 76–84°Glowlight tetra 74–80°
The green band is the temperature range both can live in.
456789Both: 6–7Cardinal tetra 4.6–7Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Cardinal tetra · 2 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

Cardinal tetraGlowlight tetra
Temperature76–84 °F74–80 °F
pH4.6–76–7.5
Adult size2.0 in1.5 in
Minimum tank20 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can cardinal tetras live with glowlight tetras?

Yes. Cardinal tetras and glowlight tetras make a good pair. Both are fine at 76–80°F. Plan on at least 20 gal.

What temperature suits both cardinal tetras and glowlight tetras?

76–80 °F. Cardinal tetras need 76–84 °F, glowlight tetras need 74–80 °F.

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

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