Can otocinclus live with dwarf gouramis?

Verdict
Yes

Yes. Otocinclus and dwarf gouramis make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

OtocinclusOtocinclus72–79°F · pH 6–7.5 Dwarf gouramiDwarf gourami72–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Otocinclus 72–79°Dwarf gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Otocinclus 6–7.5Dwarf gourami 6–7.5
The green band is the pH both tolerate.

Size to scale

Otocinclus · 2 inDwarf gourami · 3 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

OtocinclusDwarf gourami
Temperature72–79 °F72–82 °F
pH6–7.56–7.5
Adult size2.0 in3.0 in
Minimum tank20 gal10 gal
TemperamentPeacefulPeaceful
Swims atBottomTop
GroupGroups of 6+Alone or in pairs
DietHerbivoreOmnivore

Better tank mates for otocinclus

All otocinclus tank mates

Better tank mates for dwarf gouramis

All dwarf gourami tank mates

Questions

Can otocinclus live with dwarf gouramis?

Yes. Otocinclus and dwarf gouramis make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both otocinclus and dwarf gouramis?

72–79 °F. Otocinclus need 72–79 °F, dwarf gouramis need 72–82 °F.

What size tank do otocinclus and dwarf gouramis need together?

At least 20 gal, set by the otocinclus. Add space for each extra fish.