the fry of Koi 1. Time: The temperature in April-May is suitable, neither hot nor cold, and it is also the spawning period of Koi, so it is best to choose the fry at the end of May. Because the fry has hatched successfully at this time.
2. Activity: When selecting the fry, you can test the activity of the koi. You can stir the water in the fish tank into a vortex. The fish that can swim counterclockwise on the edge of the vortex is a good fry.
3. Body shape and color: First of all, observe whether the swimming of koi is normal and whether there are any defects in the body. If the fry is hatched together, it is better to choose a larger one, which is generally very strong. In addition, it is better to choose colors and patterns that are evenly distributed and symmetrical.
the young koi carp at home? The density of the young koi carp in the fish tank should not be too high, and it needs to be matched with a powerful circulating filtration system. Because the fry is usually fed with shrimp or egg yolk, these two kinds of food can easily destroy the water quality, so the feeding density can not be too high. If it is raised in a fish pond, water should be tested before stocking to check whether the water quality is suitable. Feeding can feed soybean milk, about 3 kilograms per mu per day, and then it needs to be fed regularly and quantitatively according to the growth rate of fish.
