Can koi live with yoyo loaches?

Verdict

No. Koi and yoyo loaches should not share a tank. Koi are coldwater animals (59–77°F); yoyo loaches need 75–86°F. They overlap only at 75–77°F, the edge of both ranges.

Koi59–77°F · pH 7–8.5

Yoyo loach75–86°F · pH 6–7.5

What to watch

Deal breakerKoi are coldwater animals (59–77°F); yoyo loaches need 75–86°F. They overlap only at 75–77°F, the edge of both ranges.
Watch outA grown koi may treat small yoyo loaches 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	Yoyo loach
Temperature	59–77 °F	75–86 °F
pH	7–8.5	6–7.5
Adult size	24.0 in	5.0 in
Minimum tank	Pond	40 gal
Temperament	Peaceful	Semi-aggressive
Swims at	All levels	Bottom
Group	Groups of 3+	Groups of 5+
Diet	Omnivore	Omnivore

Better tank mates for koi

All koi tank mates

Better tank mates for yoyo loaches