Clearing ponds is an important part of doing a good job of healthy breeding. It includes clear ponds and refurbishment work. The former refers to drainage of pool water, excavation of excessive silt, so that the bottom of the pool full of sun, ice or quicklime, bleach and other drugs Quanchiposa to achieve sterilization, kill the enemy of the purpose of the enemy. The latter refers to the reinforcement of ponds, the inspection and repair of facilities, and the clearing of water inlets and drains, etc., to do a good job of preventing escape, seepage prevention and leak prevention. The benefits of clearing are as follows: 1, increase the amount of fish in the water. At present, some ponds have not been dredged for many years, and the pool embankments have collapsed and the bottom silt has become more (some depths are more than 0.6-0.7m), the pond mouth has become shallow, the water space has been relatively reduced, and some water depths are only about 1.2m. Affected the amount of fish in the water body. Problems such as easy-to-float heads, susceptibility to disease, and low yields have hampered the development of the fishery economy. Once the increase in the amount of acres of stocking, summer is easy to float head, easy to dead fish. Only by removing excessive silt, broadening the living space, and increasing the stocking capacity per unit area can we effectively improve economic efficiency. 2, reduce the risk of disease. The silt layer of the pond is generally about 20 cm, which is more suitable. It has the effects of supplying fertilizer, conserving fertilizer, and regulating water quality. Excessive water quality is prone to deterioration, and it is prone to hypoxia and prone to disease. There are many silts in the bottom layer, in which there are also many organic matters. A large amount of organic matter is oxidized and decomposed and consumes a large amount of oxygen. This often causes the exhaustion of oxygen in the lower layer of the pond to be exhausted, resulting in an oxygen deficient state. Under hypoxic conditions, anaerobic bacteria multiply, and their decomposition produces many harmful substances such as ammonia, hydrogen sulfide, methane, and organic acids, which are detrimental to fish growth. In addition, too much sludge will easily lead to deterioration of water quality, increase of acidity, and easy propagation of pathogenic bacteria. At the same time, in unfavorable environments, fish's resistance will be weakened and diseases will occur easily. When the weather is hot, sudden thunderstorms, or strong convective weather, the temperature change is greater than 3 ~ 5 °C, the more silt of the pond is easy to lack of oxygen, flooding ponds, prone to outbreak of disease. Through dredging, providing a good environment can reduce the hidden dangers. 3, improve the bottom, prevent disease. At the same time as the dredging, it adopts freezing, sun exposure, or lime disinfecting to improve the bottom quality and prevent diseases. The pool water is drained to allow the bottom of the pool to fully receive wind, sun and ice, killing many pests and bacteria, and promoting the oxidative decomposition of organic matter in the sludge, creating conditions for improving the water environment. Clear pond drug preferred lime, dose: 75 ~ 120kg / mu (dry). If quicklime is not used, it is generally recommended that the appropriate amount of quicklime (about 20kg/mu) be used for improvement. The role of quicklime is as follows: (1) When PH=11, it can effectively kill the fish parasites, pathogens, insects and their larvae that are harmful to fish that are grown in the mud. (2) It can neutralize various organic acids in the sludge, so that the pool water maintains a suitable pH. (3) to provide calcium, promote the release of fixed nutrients in the sludge, increase the pool water. (4) Appropriate alkalinity and hardness are required for fish growth. By applying lime, the alkalinity and hardness of the water body can be increased, and the buffering capacity of the water body can be enhanced. planet nutrition enhancers,nutrition water enhancers,nutrition absorption enhancer Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropic.com