Can koi live with pearl gouramis?

Verdict

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

Koi59–77°F · pH 7–8.5

Pearl gourami77–82°F · pH 6–7.5

What to watch

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

What works

pH 7–7.5 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	Pearl gourami
Temperature	59–77 °F	77–82 °F
pH	7–8.5	6–7.5
Adult size	24.0 in	5.0 in
Minimum tank	Pond	30 gal
Temperament	Peaceful	Peaceful
Swims at	All levels	Top
Group	Groups of 3+	Alone or in pairs
Diet	Omnivore	Omnivore

Better tank mates for koi

All koi tank mates

Better tank mates for pearl gouramis

All pearl gourami tank mates

Questions

Can koi live with pearl gouramis?

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

What temperature suits both koi and pearl gouramis?

77–77 °F. Koi need 59–77 °F, pearl gouramis need 77–82 °F.

What size tank do koi and pearl gouramis need together?

A pond. Koi outgrow indoor tanks.