Can koi live with blue gouramis?

Verdict
Yes, with care

Yes, with care. Koi and blue gouramis can share a tank, but watch one thing. A grown koi may treat small blue gouramis as food, especially at night.

KoiKoi59–77°F · pH 7–8.5 Blue gouramiBlue gourami72–82°F · pH 6–8

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Koi 59–77°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 7–8Koi 7–8.5Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Koi · 24 inBlue gourami · 5 in0"6"12"18"24"
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

KoiBlue gourami
Temperature59–77 °F72–82 °F
pH7–8.56–8
Adult size24.0 in5.0 in
Minimum tankPond30 gal
TemperamentPeacefulSemi-aggressive
Swims atAll levelsTop
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for koi

All koi tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can koi live with blue gouramis?

Yes, with care. Koi and blue gouramis can share a tank, but watch one thing. A grown koi may treat small blue gouramis as food, especially at night.

What temperature suits both koi and blue gouramis?

72–77 °F. Koi need 59–77 °F, blue gouramis need 72–82 °F.

What size tank do koi and blue gouramis need together?

A pond. Koi outgrow indoor tanks.