Can tiger barbs live with lemon tetras?

Verdict
Yes

Yes. Tiger barbs and lemon tetras get along in the same tank. Both are fine at 72–81°F. Plan on at least 30 gal.

Tiger barbTiger barb72–81°F · pH 6–7.5 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: 72–81°Tiger barb 72–81°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Tiger barb 6–7.5Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Tiger 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

Tiger barbLemon tetra
Temperature72–81 °F72–82 °F
pH6–7.55.5–7.5
Adult size3.0 in2.0 in
Minimum tank30 gal15 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can tiger barbs live with lemon tetras?

Yes. Tiger barbs and lemon tetras get along in the same tank. Both are fine at 72–81°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and lemon tetras?

72–81 °F. Tiger barbs need 72–81 °F, lemon tetras need 72–82 °F.

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

At least 30 gal, set by the tiger barb. Add space for each extra fish.