Can blue gouramis live with black neon tetras?

Verdict
Yes

Yes, blue gouramis and black neon tetras can live together. Both are fine at 73–81°F. Plan on at least 30 gal.

Blue gouramiBlue gourami72–82°F · pH 6–8 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°Blue gourami 72–82°Black neon tetra 73–81°
The green band is the temperature range both can live in.
456789Both: 6–7.5Blue gourami 6–8Black neon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Blue gourami · 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

Blue gouramiBlack neon tetra
Temperature72–82 °F73–81 °F
pH6–85.5–7.5
Adult size5.0 in1.5 in
Minimum tank30 gal15 gal
TemperamentSemi-aggressivePeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for blue gouramis

All blue gourami tank mates

Better tank mates for black neon tetras

All black neon tetra tank mates

Questions

Can blue gouramis live with black neon tetras?

Yes, blue gouramis and black neon tetras can live together. Both are fine at 73–81°F. Plan on at least 30 gal.

What temperature suits both blue gouramis and black neon tetras?

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

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

At least 30 gal, set by the blue gourami. Add space for each extra fish.