Can kribensis live with black skirt tetras?

Verdict
Yes

Yes, kribensis and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 30 gal.

KribensisKribensis75–80°F · pH 6–7.5 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°Kribensis 75–80°Black skirt tetra 70–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Kribensis 6–7.5Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Kribensis · 4 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

KribensisBlack skirt tetra
Temperature75–80 °F70–80 °F
pH6–7.56–7.5
Adult size4.0 in2.5 in
Minimum tank30 gal15 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for kribensis

All kribensis tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can kribensis live with black skirt tetras?

Yes, kribensis and black skirt tetras can live together. Both are fine at 75–80°F. Plan on at least 30 gal.

What temperature suits both kribensis and black skirt tetras?

75–80 °F. Kribensis need 75–80 °F, black skirt tetras need 70–80 °F.

What size tank do kribensis and black skirt tetras need together?

At least 30 gal, set by the kribensis. Add space for each extra fish.