Can guppies live with gold barbs?

Verdict
Yes

Yes. Guppies and gold barbs make a good pair. Both are fine at 72–75°F. Plan on at least 20 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 Gold barbGold barb64–75°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–75°Guppy 72–82°Gold barb 64–75°
The green band is the temperature range both can live in.
456789Both: 6.8–7.8Guppy 6.8–7.8Gold barb 6–8
The green band is the pH both tolerate.

Size to scale

Guppy · 2 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

GuppyGold barb
Temperature72–82 °F64–75 °F
pH6.8–7.86–8
Adult size2.0 in3.0 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for gold barbs

All gold barb tank mates

Questions

Can guppies live with gold barbs?

Yes. Guppies and gold barbs make a good pair. Both are fine at 72–75°F. Plan on at least 20 gal.

What temperature suits both guppies and gold barbs?

72–75 °F. Guppies need 72–82 °F, gold barbs need 64–75 °F.

What size tank do guppies and gold barbs need together?

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