Can koi live with peacock cichlids?

Verdict

No. Koi and peacock cichlids should not share a tank. Koi are coldwater animals (59–77°F); peacock cichlids need 76–82°F. They overlap only at 76–77°F, the edge of both ranges.

Koi59–77°F · pH 7–8.5

Peacock cichlid76–82°F · pH 7.8–8.6

What to watch

Deal breakerKoi are coldwater animals (59–77°F); peacock cichlids need 76–82°F. They overlap only at 76–77°F, the edge of both ranges.
Watch outA grown koi may treat small peacock cichlids as food, especially at night.

What works

pH 7.8–8.5 suits both.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

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

	Koi	Peacock cichlid
Temperature	59–77 °F	76–82 °F
pH	7–8.5	7.8–8.6
Adult size	24.0 in	6.0 in
Minimum tank	Pond	55 gal
Temperament	Peaceful	Semi-aggressive
Swims at	All levels	Middle
Group	Groups of 3+	Groups of 4+
Diet	Omnivore	Carnivore

Better tank mates for koi

All koi tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can koi live with peacock cichlids?

No. Koi and peacock cichlids should not share a tank. Koi are coldwater animals (59–77°F); peacock cichlids need 76–82°F. They overlap only at 76–77°F, the edge of both ranges.

What temperature suits both koi and peacock cichlids?

76–77 °F. Koi need 59–77 °F, peacock cichlids need 76–82 °F.

What size tank do koi and peacock cichlids need together?

A pond. Koi outgrow indoor tanks.