Can plecos live with tinfoil barbs?

Verdict
Yes

Yes. Plecos and tinfoil barbs make a good pair. Both are fine at 72–80°F. Plan on at least 125 gal.

Common plecoCommon pleco72–86°F · pH 6.5–7.5 Tinfoil barbTinfoil barb72–80°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–80°Common pleco 72–86°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Common pleco 6.5–7.5Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Common pleco · 15 inTinfoil barb · 12 in0"2"4"6"8"10"12"14"
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

Common plecoTinfoil barb
Temperature72–86 °F72–80 °F
pH6.5–7.56.5–7.5
Adult size15.0 in12.0 in
Minimum tank125 gal125 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 5+
DietHerbivoreOmnivore

Better tank mates for plecos

All common pleco tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can plecos live with tinfoil barbs?

Yes. Plecos and tinfoil barbs make a good pair. Both are fine at 72–80°F. Plan on at least 125 gal.

What temperature suits both plecos and tinfoil barbs?

72–80 °F. Plecos need 72–86 °F, tinfoil barbs need 72–80 °F.

What size tank do plecos and tinfoil barbs need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.