Can sparkling gouramis live with otocinclus?

Verdict
Yes

Yes, sparkling gouramis and otocinclus can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

Sparkling gouramiSparkling gourami72–82°F · pH 6–7.5 OtocinclusOtocinclus72–79°F · pH 6–7.5

Why it works

Water side by side

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

Size to scale

Sparkling gourami · 1.5 inOtocinclus · 2 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

Sparkling gouramiOtocinclus
Temperature72–82 °F72–79 °F
pH6–7.56–7.5
Adult size1.5 in2.0 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 4+Groups of 6+
DietOmnivoreHerbivore

Better tank mates for sparkling gouramis

All sparkling gourami tank mates

Better tank mates for otocinclus

All otocinclus tank mates

Questions

Can sparkling gouramis live with otocinclus?

Yes, sparkling gouramis and otocinclus can live together. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both sparkling gouramis and otocinclus?

72–79 °F. Sparkling gouramis need 72–82 °F, otocinclus need 72–79 °F.

What size tank do sparkling gouramis and otocinclus need together?

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