1. Healthy and beautiful: Koi looks more lively and has a strong appetite, so it is easier to feed. When the fish body of Koi has the phenomenon of losing scales and rotten fins, it can not be selected. Such Koi is usually sick. The back of the koi should be straight, the swimming posture should be smooth, and the mouth of the fish should be correct, so that the koi is more beautiful.
2. The color and luster should be bright: the color and luster of koi directly determine the ornamental value, so it is necessary to select koi with uniform color and luster. The edges should be neat and orderly, and the veins should be clear. In addition, different species of koi have different requirements for veins, such as scarlet color should be lower than the nose, not than the fundus, and the ink of Dazheng can not reach the head.
3. The distance between the eyes should be far: the distance between the two eyes of the koi should be far, so that there will be more room for growth in the later period, and the koi will grow bigger. In addition, when choosing Koi, the eyes and mouth should be far apart, so that it looks good.
1. Water temperature: The water temperature for raising koi should be maintained at 20 to 30 degrees. There should be enough oxygen in the water, and the water temperature should not fluctuate too much.
2. Feeding: The feeding habits of koi are mixed. You can feed koi with mollusks such as tubificidae or pellet feed, which is conducive to the later hair color and growth and development of koi.
3. Space: The size of Koi is relatively large, so it is better to have enough space in the fish tank. In addition, we should control the density of breeding, not too large, in order to avoid their lack of oxygen.
