El-Serw fish farm is situated on the southern west shore of Manzala Lake near El-Serw navigation canal, about 200 km northeast Cairo. In fact, water in Egypt has become a scarce commodity and its use should be optimized. Nowadays, the maintenance of these fish cultures out of pollution is of greatest concern. The agricultural drainage water is considered as one of the most important water sources to El-Serw fish farm. Consequently, the chemical analysis of the water supply, pond water and effluent water of the farm as well as the determination of some heavy metals and pesticides, are of great...