First, grasp the rest of the clear pond. Use winter time to drain pool water, let the sun shine, freeze the bottom of the pool, and remove excess silt to improve the bottom of the pond. Rehabilitate and reinforce the pond dyke to ensure the safety of the cultivation.
Second, grasp the seedlings off. Choose good-quality species that are physically robust, disease-free, complete on the surface, and capable of swimming. Develop a reasonable stocking plan for fish species, select the days when the weather is clear, and put them in the upper wind of Tangkou. Disinfect the fish with 5 % salt water before disinfecting for 5-8 minutes. At the time of launching, tilt the container of the fish species in the water so that the fish species can swim slowly and try to avoid injury to the fish species.
Third, grasp the feed feeding off. When the water temperature is suitable, the feed is fed in time, and the feed with high nutritional value is fed at the beginning so as to enable the fish to eat as early as possible, restore the body as early as possible, and increase the resistance to disease. High-quality bait is the material basis for healthy fish farming. It must be ensured that no rotten or degraded food is fed. At the same time, the number of feeds and the amount of feed should be adjusted according to weather changes and water temperature.
Fourth, grasp the water quality management. To prevent the occurrence of diseases in the spring, we must cultivate a water quality environment that is suitable for the healthy growth of fish. Strictly control the water source, prevent sewage from entering the pond, and if necessary, measure the ammonia nitrogen, dissolved oxygen, and pH of the water so that the water can be adjusted in time. Observe the changes in the weather, add new water in a timely manner, increase oxygen levels at a proper time, keep the water fresh, and keep sufficient oxygen. According to the changes in the water color of the pool, determine the degree of fat and make a reasonable fertilization, so that the pool water always maintains "fat, live, tender and cool", and the transparency is maintained at 25-35 cm.
Summary: Spring is a critical time for fish farming. Before releasing fish, it is necessary to first clean up the fish ponds, and then pay attention to water quality problems. Pay attention to the dynamic symptoms of fish and take immediate measures to avoid further losses.
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