Can peacock cichlids live with swordtails?

Verdict
Yes

Yes. Peacock cichlids and swordtails make a good pair. Both are fine at 76–79°F. Plan on at least 55 gal.

Peacock cichlidPeacock cichlid76–82°F · pH 7.8–8.6 SwordtailSwordtail72–79°F · pH 7–8.3

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–79°Peacock cichlid 76–82°Swordtail 72–79°
The green band is the temperature range both can live in.
456789Both: 7.8–8.3Peacock cichlid 7.8–8.6Swordtail 7–8.3
The green band is the pH both tolerate.

Size to scale

Peacock cichlid · 6 inSwordtail · 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

Peacock cichlidSwordtail
Temperature76–82 °F72–79 °F
pH7.8–8.67–8.3
Adult size6.0 in5.0 in
Minimum tank55 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 4+Groups of 3+
DietCarnivoreOmnivore

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Better tank mates for swordtails

All swordtail tank mates

Questions

Can peacock cichlids live with swordtails?

Yes. Peacock cichlids and swordtails make a good pair. Both are fine at 76–79°F. Plan on at least 55 gal.

What temperature suits both peacock cichlids and swordtails?

76–79 °F. Peacock cichlids need 76–82 °F, swordtails need 72–79 °F.

What size tank do peacock cichlids and swordtails need together?

At least 55 gal, set by the peacock cichlid. Add space for each extra fish.