Many aquarists report that the koi fish they just bought are bright in color and deep crimson, and they look very beautiful, but after raising them for a while, the color gradually fades. Some people think that they have been cheated by fish dealers. Some people think that raising koi fish requires very high technical requirements and is difficult to raise, which dampens their interest in raising koi fish. In fact, there are many reasons why the color of ornamental fish Koi becomes pale. As long as you understand the reason why Koi becomes pale, the problem can be easily solved. Generally, these conditions affect the color of koi.

1. The influence of water quality and environment affects the color of the fish

< p>We all know that the water quality in different areas is definitely different, and the fish species produced are different in size, color, and personality. To sum up, it is "a water area, a kind of fish". It is precisely because of different water quality environments that the colors of fish body surfaces vary greatly. When a fish changes to a different water environment, it may cause the fish to fade or the color of its body surface to change.

2. Genetic factors cause changes in the body color of fish.

At different stages of fish growth, the body color is also constantly changing. Some fish will have an obvious "color change period", which is mainly due to genetic factors. When the breeder feeds it properly and manages it scientifically, it can also make the fish's body color more beautiful and perfect. Otherwise, it will cause the fish's body surface to fade and become dull, reducing the fish's ornamental value.

3. Fish raised with added pigments are prone to fading.

The color of this fish is acquired through rearing, and pigments are added to the surface of the fish. When the fish stops taking the pigment, the color of the fish's body surface will slowly fade and dim.

In fact, to ensure that the fish has a perfect body color, it is necessary to ensure that the fish has a good eating habit and a nutritionally balanced food. When raising, you need to feed live food regularly, such as earthworms, insects, etc. This type of food has high nutritional value and is very useful in improving the body color of fish.