Can chili rasboras live with black skirt tetras?

Verdict
Yes

Yes, chili rasboras and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 15 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Chili rasbora 75–82°Black skirt tetra 70–80°
The green band is the temperature range both can live in.
456789Both: 6–7Chili rasbora 4–7Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 inBlack skirt tetra · 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 rasboraBlack skirt tetra
Temperature75–82 °F70–80 °F
pH4–76–7.5
Adult size0.8 in2.5 in
Minimum tank5 gal15 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 8+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can chili rasboras live with black skirt tetras?

Yes, chili rasboras and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 15 gal.

What temperature suits both chili rasboras and black skirt tetras?

75–80 °F. Chili rasboras need 75–82 °F, black skirt tetras need 70–80 °F.

What size tank do chili rasboras and black skirt tetras need together?

At least 15 gal, set by the black skirt tetra. Add space for each extra fish.