一、改善鱼塘的条件利用污水养鱼的池塘，面积宜大，若鱼塘面过小，净化污水的能力有限，水质不易控制而恶化，从而导致鱼的浮头甚至汽塘而死鱼。面积大则受风面和光照面增加，池水含氧量也高，有利于有机物的分解和污水的净化。池塘不宜过深，因为污水较浑浊，透明度低，池水 First, improve the conditions of fish ponds Pond fish ponds, the area should be large, if the fish ponds are too small, limited capacity to purify sewage, water quality is not easy to control and deteriorated, leading to the floating head of fish and even dead fish pond. Large area is affected by the wind and light surface increases, the oxygen content of water is also high, is conducive to the decomposition of organic matter and sewage purification. Pond should not be too deep, because the sewage more turbid, low transparency, water