Can bettas live with gold barbs?

Verdict
No

No. Bettas and gold barbs should not share a tank. No shared temperature. Bettas need 76–82°F, gold barbs need 64–75°F.

BettaBetta76–82°F · pH 6.5–7.5 Gold barbGold barb64–75°F · pH 6–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Betta 76–82°Gold barb 64–75°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6.5–7.5Betta 6.5–7.5Gold barb 6–8
The green band is the pH both tolerate.

Size to scale

Betta · 2.5 inGold barb · 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

BettaGold barb
Temperature76–82 °F64–75 °F
pH6.5–7.56–8
Adult size2.5 in3.0 in
Minimum tank5 gal20 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupOne per tankGroups of 6+
DietCarnivoreOmnivore

Better tank mates for bettas

All betta tank mates

Better tank mates for gold barbs

All gold barb tank mates

Questions

Can bettas live with gold barbs?

No. Bettas and gold barbs should not share a tank. No shared temperature. Bettas need 76–82°F, gold barbs need 64–75°F.

What temperature suits both bettas and gold barbs?

None. Bettas need 76–82 °F and gold barbs need 64–75 °F, so the ranges do not meet.

What size tank do bettas and gold barbs need together?

At least 20 gal, set by the gold barb. Add space for each extra fish.