After the koi fish ovulate in the fish tank, the eggs should be isolated in time, otherwise the koi fish will easily eat the eggs. In addition, the water for spawning should be replaced in time, because the water will become cloudy after spawning, which is not conducive to the hatching of koi fish eggs.

When changing the water, pay attention to controlling the water temperature, the suitable temperature is 16~18 degrees Celsius In addition, two days after the koi fish spawn, it is necessary to observe whether the eggs have changed in time, because the color of the unfertilized eggs will become milky white. At this time, the unfertilized eggs should be removed in time to avoid affecting the hatching of the fertilized eggs.