Can bettas live with glofish?

Verdict
No

No. Bettas and glofish should not share a tank. Glofish nip fins, and the long fins of bettas are an easy target.

BettaBetta76–82°F · pH 6.5–7.5 GloFish tetraGloFish tetra72–80°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–80°Betta 76–82°GloFish tetra 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Betta 6.5–7.5GloFish tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 inGloFish tetra · 2.5 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

BettaGloFish tetra
Temperature76–82 °F72–80 °F
pH6.5–7.56–7.5
Adult size2.5 in2.5 in
Minimum tank5 gal15 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atTopMiddle
GroupOne per tankGroups of 6+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for glofish

All glofish tetra tank mates

Questions

Can bettas live with glofish?

No. Bettas and glofish should not share a tank. Glofish nip fins, and the long fins of bettas are an easy target.

What temperature suits both bettas and glofish?

76–80 °F. Bettas need 76–82 °F, glofish need 72–80 °F.

What size tank do bettas and glofish need together?

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