Can chili rasboras live with hatchetfish?

Verdict
Yes

Yes. Chili rasboras and hatchetfish get along in the same tank. Both are fine at 75–81°F. Plan on at least 20 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 HatchetfishHatchetfish75–81°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–81°Chili rasbora 75–82°Hatchetfish 75–81°
The green band is the temperature range both can live in.
456789Both: 5.5–7Chili rasbora 4–7Hatchetfish 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 inHatchetfish · 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

Chili rasboraHatchetfish
Temperature75–82 °F75–81 °F
pH4–75.5–7.5
Adult size0.8 in1.5 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleTop
GroupGroups of 8+Groups of 6+
DietCarnivoreCarnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for hatchetfish

All hatchetfish tank mates

Questions

Can chili rasboras live with hatchetfish?

Yes. Chili rasboras and hatchetfish get along in the same tank. Both are fine at 75–81°F. Plan on at least 20 gal.

What temperature suits both chili rasboras and hatchetfish?

75–81 °F. Chili rasboras need 75–82 °F, hatchetfish need 75–81 °F.

What size tank do chili rasboras and hatchetfish need together?

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