Can bettas live with glass catfish?

Verdict
Yes

Yes. Bettas and glass catfish make a good pair. Both are fine at 76–80°F. Plan on at least 30 gal.

BettaBetta76–82°F · pH 6.5–7.5 Glass catfishGlass catfish75–80°F · pH 6.5–7.5

Why it works

Water side by side

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

Size to scale

Betta · 2.5 inGlass catfish · 3 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

BettaGlass catfish
Temperature76–82 °F75–80 °F
pH6.5–7.56.5–7.5
Adult size2.5 in3.0 in
Minimum tank5 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 6+
DietCarnivoreCarnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for glass catfish

All glass catfish tank mates

Questions

Can bettas live with glass catfish?

Yes. Bettas and glass catfish make a good pair. Both are fine at 76–80°F. Plan on at least 30 gal.

What temperature suits both bettas and glass catfish?

76–80 °F. Bettas need 76–82 °F, glass catfish need 75–80 °F.

What size tank do bettas and glass catfish need together?

At least 30 gal, set by the glass catfish. Add space for each extra fish.