Can platies live with peacock cichlids?

Verdict
Yes

Yes, platies and peacock cichlids can live together. Both are fine at 76–80°F. Plan on at least 55 gal.

PlatyPlaty70–80°F · pH 7–8.2 Peacock cichlidPeacock cichlid76–82°F · pH 7.8–8.6

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–80°Platy 70–80°Peacock cichlid 76–82°
The green band is the temperature range both can live in.
456789Both: 7.8–8.2Platy 7–8.2Peacock cichlid 7.8–8.6
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 inPeacock cichlid · 6 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

PlatyPeacock cichlid
Temperature70–80 °F76–82 °F
pH7–8.27.8–8.6
Adult size2.5 in6.0 in
Minimum tank10 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 3+Groups of 4+
DietOmnivoreCarnivore

Better tank mates for platies

All platy tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can platies live with peacock cichlids?

Yes, platies and peacock cichlids can live together. Both are fine at 76–80°F. Plan on at least 55 gal.

What temperature suits both platies and peacock cichlids?

76–80 °F. Platies need 70–80 °F, peacock cichlids need 76–82 °F.

What size tank do platies and peacock cichlids need together?

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