Can chili rasboras live with killifish?

Verdict
Yes

Yes, chili rasboras and killifish can live together. Both are fine at 75–77°F. Plan on at least 10 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 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°Chili rasbora 75–82°Killifish 70–77°
The green band is the temperature range both can live in.
456789Both: 5.5–7Chili rasbora 4–7Killifish 5.5–7
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 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

Chili rasboraKillifish
Temperature75–82 °F70–77 °F
pH4–75.5–7
Adult size0.8 in2.5 in
Minimum tank5 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleTop
GroupGroups of 8+Alone or in pairs
DietCarnivoreCarnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for killifish

All killifish tank mates

Questions

Can chili rasboras live with killifish?

Yes, chili rasboras and killifish can live together. Both are fine at 75–77°F. Plan on at least 10 gal.

What temperature suits both chili rasboras and killifish?

75–77 °F. Chili rasboras need 75–82 °F, killifish need 70–77 °F.

What size tank do chili rasboras and killifish need together?

At least 10 gal, set by the killifish. Add space for each extra fish.