Can tiger barbs live with black neon tetras?

Verdict
Yes

Yes. Tiger barbs and black neon tetras make a good pair. Both are fine at 73–81°F. Plan on at least 30 gal.

Tiger barbTiger barb72–81°F · pH 6–7.5 Black neon tetraBlack neon tetra73–81°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Tiger barb 72–81°Black neon tetra 73–81°
The green band is the temperature range both can live in.
456789Both: 6–7.5Tiger barb 6–7.5Black neon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 inBlack neon tetra · 1.5 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 barbBlack neon tetra
Temperature72–81 °F73–81 °F
pH6–7.55.5–7.5
Adult size3.0 in1.5 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 black neon tetras

All black neon tetra tank mates

Questions

Can tiger barbs live with black neon tetras?

Yes. Tiger barbs and black neon tetras make a good pair. Both are fine at 73–81°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and black neon tetras?

73–81 °F. Tiger barbs need 72–81 °F, black neon tetras need 73–81 °F.

What size tank do tiger barbs and black neon tetras need together?

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