Can swordtails live with elephant nose fish?

Verdict
Yes

Yes. Swordtails and elephant nose fish make a good pair. Both are fine at 73–79°F. Plan on at least 55 gal.

SwordtailSwordtail72–79°F · pH 7–8.3 Elephant nose fishElephant nose fish73–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Swordtail 72–79°Elephant nose fish 73–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Swordtail 7–8.3Elephant nose fish 6–7.5
The green band is the pH both tolerate.

Size to scale

Swordtail · 5 inElephant nose fish · 9 in0"1"2"3"4"5"6"7"8"9"
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

SwordtailElephant nose fish
Temperature72–79 °F73–82 °F
pH7–8.36–7.5
Adult size5.0 in9.0 in
Minimum tank30 gal55 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleBottom
GroupGroups of 3+Alone or in pairs
DietOmnivoreCarnivore

Better tank mates for swordtails

All swordtail tank mates

Better tank mates for elephant nose fish

All elephant nose fish tank mates

Questions

Can swordtails live with elephant nose fish?

Yes. Swordtails and elephant nose fish make a good pair. Both are fine at 73–79°F. Plan on at least 55 gal.

What temperature suits both swordtails and elephant nose fish?

73–79 °F. Swordtails need 72–79 °F, elephant nose fish need 73–82 °F.

What size tank do swordtails and elephant nose fish need together?

At least 55 gal, set by the elephant nose fish. Add space for each extra fish.