Can black neon tetras live with clown plecos?

Verdict
Yes

Yes. Black neon tetras and clown plecos get along in the same tank. Both are fine at 73–81°F. Plan on at least 20 gal.

Black neon tetraBlack neon tetra73–81°F · pH 5.5–7.5 Clown plecoClown pleco73–82°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–81°Black neon tetra 73–81°Clown pleco 73–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Black neon tetra 5.5–7.5Clown pleco 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Black neon tetra · 1.5 inClown pleco · 3.5 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

Black neon tetraClown pleco
Temperature73–81 °F73–82 °F
pH5.5–7.56.5–7.5
Adult size1.5 in3.5 in
Minimum tank15 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for black neon tetras

All black neon tetra tank mates

Better tank mates for clown plecos

All clown pleco tank mates

Questions

Can black neon tetras live with clown plecos?

Yes. Black neon tetras and clown plecos get along in the same tank. Both are fine at 73–81°F. Plan on at least 20 gal.

What temperature suits both black neon tetras and clown plecos?

73–81 °F. Black neon tetras need 73–81 °F, clown plecos need 73–82 °F.

What size tank do black neon tetras and clown plecos need together?

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