Can bettas live with glowlight tetras?

Verdict
Yes

Yes, bettas and glowlight tetras can live together. Both are fine at 76–80°F. Plan on at least 10 gal.

BettaBetta76–82°F · pH 6.5–7.5 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: 76–80°Betta 76–82°Glowlight tetra 74–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Betta 6.5–7.5Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 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

BettaGlowlight tetra
Temperature76–82 °F74–80 °F
pH6.5–7.56–7.5
Adult size2.5 in1.5 in
Minimum tank5 gal10 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 6+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for glowlight tetras

All glowlight tetra tank mates

Questions

Can bettas live with glowlight tetras?

Yes, bettas and glowlight tetras can live together. Both are fine at 76–80°F. Plan on at least 10 gal.

What temperature suits both bettas and glowlight tetras?

76–80 °F. Bettas need 76–82 °F, glowlight tetras need 74–80 °F.

What size tank do bettas and glowlight tetras need together?

At least 10 gal, set by the glowlight tetra. Add space for each extra fish.