Koi fades and turns white, which indicates that the environment makes it uncomfortable, and it needs to be properly heated, oxygenated and fed with some nutritious food to make it recover. Usually, fading is caused by stress reaction, which indicates that there is something wrong with feeding, which may be too low temperature or insufficient oxygenation. At ordinary times, we should pay attention to changing water to keep the water clean and hygienic, but we should not change water too frequently, otherwise the fish may fade.

1. The background color is too light: The fading of koi may be due to the light background color, which will change its own color according to the surrounding environment. In this case, the breeder can change the dark background so that it can recover for a while.

2, poor water quality: If the water quality is too poor, koi fish will fade and turn white. This is a kind of self-protection instinct of koi fish, because poor water quality will affect their health, so they will fade or turn white slowly. Usually, it is necessary to change water regularly, keep the PH value between 7.2 and 7.4, and ensure the clean water quality. During the period, keep the water temperature constant, and don't feed colorful feed. Pay attention to the amount of water when changing water, and control the amount of water each time in a quarter of the total amount of water.

3. Merchants cheat: The reason for serious fading of koi is probably that merchants feed koi with pigment, which leads to bright color when koi is bought, and fades and turns white after a period of time.