Can bolivian rams live with black skirt tetras?

Verdict
Yes

Yes. Bolivian rams and black skirt tetras make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

Bolivian ramBolivian ram72–79°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: 72–79°Bolivian ram 72–79°Black skirt tetra 70–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Bolivian ram 6–7.5Black skirt tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Bolivian ram · 3 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

Bolivian ramBlack skirt tetra
Temperature72–79 °F70–80 °F
pH6–7.56–7.5
Adult size3.0 in2.5 in
Minimum tank20 gal15 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for bolivian rams

All bolivian ram tank mates

Better tank mates for black skirt tetras

All black skirt tetra tank mates

Questions

Can bolivian rams live with black skirt tetras?

Yes. Bolivian rams and black skirt tetras make a good pair. Both are fine at 72–79°F. Plan on at least 20 gal.

What temperature suits both bolivian rams and black skirt tetras?

72–79 °F. Bolivian rams need 72–79 °F, black skirt tetras need 70–80 °F.

What size tank do bolivian rams and black skirt tetras need together?

At least 20 gal, set by the bolivian ram. Add space for each extra fish.