Can kuhli loaches live with killifish?

Verdict
Yes

Yes. Kuhli loaches and killifish get along in the same tank. Both are fine at 75–77°F. Plan on at least 20 gal.

Kuhli loachKuhli loach75–86°F · pH 5.5–7 KillifishKillifish70–77°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–77°Kuhli loach 75–86°Killifish 70–77°
The green band is the temperature range both can live in.
456789Both: 5.5–7Kuhli loach 5.5–7Killifish 5.5–7
The green band is the pH both tolerate.

Size to scale

Kuhli loach · 3.5 inKillifish · 2.5 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

Kuhli loachKillifish
Temperature75–86 °F70–77 °F
pH5.5–75.5–7
Adult size3.5 in2.5 in
Minimum tank20 gal10 gal
TemperamentPeacefulPeaceful
Swims atBottomTop
GroupGroups of 6+Alone or in pairs
DietOmnivoreCarnivore

Better tank mates for kuhli loaches

All kuhli loach tank mates

Better tank mates for killifish

All killifish tank mates

Questions

Can kuhli loaches live with killifish?

Yes. Kuhli loaches and killifish get along in the same tank. Both are fine at 75–77°F. Plan on at least 20 gal.

What temperature suits both kuhli loaches and killifish?

75–77 °F. Kuhli loaches need 75–86 °F, killifish need 70–77 °F.

What size tank do kuhli loaches and killifish need together?

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