Can kissing gouramis live with tinfoil barbs?

Verdict
Yes

Yes. Kissing gouramis and tinfoil barbs get along in the same tank. Both are fine at 72–80°F. Plan on at least 125 gal.

Kissing gouramiKissing gourami72–82°F · pH 6–8 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°Kissing gourami 72–82°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Kissing gourami 6–8Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Kissing gourami · 10 inTinfoil barb · 12 in0"2"4"6"8"10"12"
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

Kissing gouramiTinfoil barb
Temperature72–82 °F72–80 °F
pH6–86.5–7.5
Adult size10.0 in12.0 in
Minimum tank55 gal125 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupAlone or in pairsGroups of 5+
DietOmnivoreOmnivore

Better tank mates for kissing gouramis

All kissing gourami tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can kissing gouramis live with tinfoil barbs?

Yes. Kissing gouramis and tinfoil barbs get along in the same tank. Both are fine at 72–80°F. Plan on at least 125 gal.

What temperature suits both kissing gouramis and tinfoil barbs?

72–80 °F. Kissing gouramis need 72–82 °F, tinfoil barbs need 72–80 °F.

What size tank do kissing gouramis and tinfoil barbs need together?

At least 125 gal, set by the tinfoil barb. Add space for each extra fish.