Can dwarf gouramis live with dwarf neon rainbowfish?

Verdict
Yes

Yes. Dwarf gouramis and dwarf neon rainbowfish get along in the same tank. Both are fine at 75–82°F. Plan on at least 20 gal.

Dwarf gouramiDwarf gourami72–82°F · pH 6–7.5 Dwarf neon rainbowfishDwarf neon rainbowfish75–82°F · pH 6.5–7.5

Why it works

Water side by side

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

Size to scale

Dwarf gourami · 3 inDwarf neon rainbowfish · 2.5 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

Dwarf gouramiDwarf neon rainbowfish
Temperature72–82 °F75–82 °F
pH6–7.56.5–7.5
Adult size3.0 in2.5 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for dwarf gouramis

All dwarf gourami tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can dwarf gouramis live with dwarf neon rainbowfish?

Yes. Dwarf gouramis and dwarf neon rainbowfish get along in the same tank. Both are fine at 75–82°F. Plan on at least 20 gal.

What temperature suits both dwarf gouramis and dwarf neon rainbowfish?

75–82 °F. Dwarf gouramis need 72–82 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do dwarf gouramis and dwarf neon rainbowfish need together?

At least 20 gal, set by the dwarf neon rainbowfish. Add space for each extra fish.