Can black skirt tetras live with boesemani rainbowfish?

Verdict
Yes

Yes. Black skirt tetras and boesemani rainbowfish get along in the same tank. Both are fine at 75–80°F. Plan on at least 30 gal.

Black skirt tetraBlack skirt tetra70–80°F · pH 6–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Black skirt tetra 70–80°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Black skirt tetra 6–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Black skirt tetra · 2.5 inBoesemani rainbowfish · 4 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

Black skirt tetraBoesemani rainbowfish
Temperature70–80 °F75–82 °F
pH6–7.57–8
Adult size2.5 in4.0 in
Minimum tank15 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can black skirt tetras live with boesemani rainbowfish?

Yes. Black skirt tetras and boesemani rainbowfish get along in the same tank. Both are fine at 75–80°F. Plan on at least 30 gal.

What temperature suits both black skirt tetras and boesemani rainbowfish?

75–80 °F. Black skirt tetras need 70–80 °F, boesemani rainbowfish need 75–82 °F.

What size tank do black skirt tetras and boesemani rainbowfish need together?

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