我朋友的鱼塘养了鱼,水泥池子,底部是泥底,最近有许多鱼死亡,有的鱼身上烂的鳞都掉了,死了许多鱼,这是怎么回事,怎么解决啊,很急啊! 没有循环泵的,池子的水也不新鲜,怎么解决啊? http://hiphotos.baidu.com/%BA%C3%BE%B2%B2%BB%BA%C3%B6%AF/pic/item/db958713aaa72c30dc54014f.jpg
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