Can gold barbs live with lemon tetras?

Verdict
Yes

Yes. Gold barbs and lemon tetras get along in the same tank. Both are fine at 72–75°F. Plan on at least 20 gal.

Gold barbGold barb64–75°F · pH 6–8 Lemon tetraLemon tetra72–82°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–75°Gold barb 64–75°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Gold barb 6–8Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Gold barb · 3 inLemon tetra · 2 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

Gold barbLemon tetra
Temperature64–75 °F72–82 °F
pH6–85.5–7.5
Adult size3.0 in2.0 in
Minimum tank20 gal15 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for gold barbs

All gold barb tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can gold barbs live with lemon tetras?

Yes. Gold barbs and lemon tetras get along in the same tank. Both are fine at 72–75°F. Plan on at least 20 gal.

What temperature suits both gold barbs and lemon tetras?

72–75 °F. Gold barbs need 64–75 °F, lemon tetras need 72–82 °F.

What size tank do gold barbs and lemon tetras need together?

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