鱼类生活在水中,平时看不见摸不着。它的生活和生长情况都是通过水体环境的变化反映出来的。人们的各种养殖措施也都要通过水环境而作用于鱼体。根据鱼类对各种环境的要求,人为地调节和控制池塘水质,是池塘养鱼日常管理工作中难度最大的一个问题。要改善池塘水质,保持鱼类良好的生活环境,就必须掌握以 Fish live in the water, usually can not see the touching. Its life and growth are reflected by changes in the water environment. People’s aquaculture practices also work on fish through the aquatic environment. According to the requirements of fish for various environments, artificially adjusting and controlling pond water quality is one of the most difficult problems in the daily management of pond fish farming. To improve the water quality of ponds and maintain a good living environment for fish, it must be mastered