Can tiger barbs live with bristlenose plecos?

Verdict
Yes

Yes, tiger barbs and bristlenose plecos can live together. Both are fine at 73–81°F. Plan on at least 30 gal.

Tiger barbTiger barb72–81°F · pH 6–7.5 Bristlenose plecoBristlenose pleco73–81°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Tiger barb 72–81°Bristlenose pleco 73–81°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Tiger barb 6–7.5Bristlenose pleco 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 inBristlenose pleco · 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 barbBristlenose pleco
Temperature72–81 °F73–81 °F
pH6–7.56.5–7.5
Adult size3.0 in5.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for bristlenose plecos

All bristlenose pleco tank mates

Questions

Can tiger barbs live with bristlenose plecos?

Yes, tiger barbs and bristlenose plecos can live together. Both are fine at 73–81°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and bristlenose plecos?

73–81 °F. Tiger barbs need 72–81 °F, bristlenose plecos need 73–81 °F.

What size tank do tiger barbs and bristlenose plecos need together?

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