Can black neon tetras live with dwarf gouramis?

Verdict
Yes

Yes. Black neon tetras and dwarf gouramis get along in the same tank. Both are fine at 73–81°F. Plan on at least 15 gal.

Black neon tetraBlack neon tetra73–81°F · pH 5.5–7.5 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: 73–81°Black neon tetra 73–81°Dwarf gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Black neon tetra 5.5–7.5Dwarf gourami 6–7.5
The green band is the pH both tolerate.

Size to scale

Black neon tetra · 1.5 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

Black neon tetraDwarf gourami
Temperature73–81 °F72–82 °F
pH5.5–7.56–7.5
Adult size1.5 in3.0 in
Minimum tank15 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleTop
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for black neon tetras

All black neon tetra tank mates

Better tank mates for dwarf gouramis

All dwarf gourami tank mates

Questions

Can black neon tetras live with dwarf gouramis?

Yes. Black neon tetras and dwarf gouramis get along in the same tank. Both are fine at 73–81°F. Plan on at least 15 gal.

What temperature suits both black neon tetras and dwarf gouramis?

73–81 °F. Black neon tetras need 73–81 °F, dwarf gouramis need 72–82 °F.

What size tank do black neon tetras and dwarf gouramis need together?

At least 15 gal, set by the black neon tetra. Add space for each extra fish.