Can clown plecos live with kissing gouramis?

Verdict
Yes

Yes. Clown plecos and kissing gouramis make a good pair. Both are fine at 73–82°F. Plan on at least 55 gal.

Clown plecoClown pleco73–82°F · pH 6.5–7.5 Kissing gouramiKissing gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–82°Clown pleco 73–82°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Clown pleco 6.5–7.5Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Clown pleco · 3.5 inKissing gourami · 10 in0"2"4"6"8"10"
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

Clown plecoKissing gourami
Temperature73–82 °F72–82 °F
pH6.5–7.56–8
Adult size3.5 in10.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsAlone or in pairs
DietHerbivoreOmnivore

Better tank mates for clown plecos

All clown pleco tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can clown plecos live with kissing gouramis?

Yes. Clown plecos and kissing gouramis make a good pair. Both are fine at 73–82°F. Plan on at least 55 gal.

What temperature suits both clown plecos and kissing gouramis?

73–82 °F. Clown plecos need 73–82 °F, kissing gouramis need 72–82 °F.

What size tank do clown plecos and kissing gouramis need together?

At least 55 gal, set by the kissing gourami. Add space for each extra fish.