Can hatchetfish live with clown plecos?

Verdict
Yes

Yes. Hatchetfish and clown plecos make a good pair. Both are fine at 75–81°F. Plan on at least 20 gal.

HatchetfishHatchetfish75–81°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: 75–81°Hatchetfish 75–81°Clown pleco 73–82°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Hatchetfish 5.5–7.5Clown pleco 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Hatchetfish · 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

HatchetfishClown pleco
Temperature75–81 °F73–82 °F
pH5.5–7.56.5–7.5
Adult size1.5 in3.5 in
Minimum tank20 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 6+Alone or in pairs
DietCarnivoreHerbivore

Better tank mates for hatchetfish

All hatchetfish tank mates

Better tank mates for clown plecos

All clown pleco tank mates

Questions

Can hatchetfish live with clown plecos?

Yes. Hatchetfish and clown plecos make a good pair. Both are fine at 75–81°F. Plan on at least 20 gal.

What temperature suits both hatchetfish and clown plecos?

75–81 °F. Hatchetfish need 75–81 °F, clown plecos need 73–82 °F.

What size tank do hatchetfish and clown plecos need together?

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