Can apistogramma live with hatchetfish?

Verdict
Yes

Yes, apistogramma and hatchetfish can live together. Both are fine at 75–81°F. Plan on at least 20 gal.

ApistogrammaApistogramma75–84°F · pH 5–7 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°Apistogramma 75–84°Hatchetfish 75–81°
The green band is the temperature range both can live in.
456789Both: 5.5–7Apistogramma 5–7Hatchetfish 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Apistogramma · 3 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

ApistogrammaHatchetfish
Temperature75–84 °F75–81 °F
pH5–75.5–7.5
Adult size3.0 in1.5 in
Minimum tank20 gal20 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomTop
GroupAlone or in pairsGroups of 6+
DietCarnivoreCarnivore

Better tank mates for apistogramma

All apistogramma tank mates

Better tank mates for hatchetfish

All hatchetfish tank mates

Questions

Can apistogramma live with hatchetfish?

Yes, apistogramma and hatchetfish can live together. Both are fine at 75–81°F. Plan on at least 20 gal.

What temperature suits both apistogramma and hatchetfish?

75–81 °F. Apistogramma need 75–84 °F, hatchetfish need 75–81 °F.

What size tank do apistogramma and hatchetfish need together?

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