Koi - National ArboretumCreative Commons License photo credit: SDCDeaCerte

As you already know the number of Koi fish should be adjusted to the Koi fish pond size. But sooner or later your Koi will spawn and new Koi will be born, nature does it naturally and there is nothing we can do to prevent Koi new babies.

The solution will be doing a population control that means remove the baby Koi. Ask around your neighbors or friends if they are interested in adopting some of your baby Koi or talk to your pet store expert and see if they accept unwanted Koi fish or if they know an association where you can put your extra Koi babies.

If you aren’t able to give your Koi away, there is a method you can use. Stop feeding your Koi for at leas three weeks as soon as you realize your Koi are spawning. They will not starve because they will start eating natural food including the your Koi. This may sound cruel but it is nature having its natural course.

If you don’t eliminate the young Koi your pond will become overpopulation, your Koi will be uncomfortable and the water can get harmful
levels of gases and chemicals.