鱼塘水质恶化,会使鱼类缺氧,中毒,严重的还会造成死亡。避免鱼塘水质恶化,应该要做到以下“四个要”。一、要适时适度清淤。一般精养鱼塘的淤泥以每年10cm左右的厚度递增。池塘底部保留15cm～20cm厚的淤泥可起到保肥,供肥和缓解水质变劣的作用。但是,水底淤泥边厚,会对鱼类带来 Fish ponds deteriorate in water quality, causing fish to become oxygen deficient and poisoning, leading to serious deaths. To avoid deterioration of the quality of fish ponds, we should achieve the following “Four Musts.” First, we should timely and appropriate dredging. The silt in general intensive fish ponds is increased by the thickness of about 10cm per year. The bottom of the pond to retain 15cm ~ 20cm thick mud can play a fat, fertilizer and alleviate the deterioration of water quality. However, thick silt bottom, will bring fish