Can sparkling gouramis live with black neon tetras?

Verdict
Yes

Yes. Sparkling gouramis and black neon tetras make a good pair. Both are fine at 73–81°F. Plan on at least 15 gal.

Sparkling gouramiSparkling gourami72–82°F · pH 6–7.5 Black neon tetraBlack neon tetra73–81°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Sparkling gourami 72–82°Black neon tetra 73–81°
The green band is the temperature range both can live in.
456789Both: 6–7.5Sparkling gourami 6–7.5Black neon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Sparkling gourami · 1.5 inBlack neon tetra · 1.5 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

Sparkling gouramiBlack neon tetra
Temperature72–82 °F73–81 °F
pH6–7.55.5–7.5
Adult size1.5 in1.5 in
Minimum tank5 gal15 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 4+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for sparkling gouramis

All sparkling gourami tank mates

Better tank mates for black neon tetras

All black neon tetra tank mates

Questions

Can sparkling gouramis live with black neon tetras?

Yes. Sparkling gouramis and black neon tetras make a good pair. Both are fine at 73–81°F. Plan on at least 15 gal.

What temperature suits both sparkling gouramis and black neon tetras?

73–81 °F. Sparkling gouramis need 72–82 °F, black neon tetras need 73–81 °F.

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

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