Can hatchetfish live with zebra loaches?

Verdict
Yes

Yes. Hatchetfish and zebra loaches make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

HatchetfishHatchetfish75–81°F · pH 5.5–7.5 Zebra loachZebra loach73–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Hatchetfish 75–81°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Hatchetfish 5.5–7.5Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Hatchetfish · 1.5 inZebra loach · 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

HatchetfishZebra loach
Temperature75–81 °F73–79 °F
pH5.5–7.56–7.5
Adult size1.5 in3.5 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 6+Groups of 5+
DietCarnivoreOmnivore

Better tank mates for hatchetfish

All hatchetfish tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can hatchetfish live with zebra loaches?

Yes. Hatchetfish and zebra loaches make a good pair. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both hatchetfish and zebra loaches?

75–79 °F. Hatchetfish need 75–81 °F, zebra loaches need 73–79 °F.

What size tank do hatchetfish and zebra loaches need together?

At least 30 gal, set by the zebra loach. Add space for each extra fish.