Manipulation of the environment to favor greater production requires an
understanding of basic physical, chemical and biological processes (Boyd, 1986).
To understand the chemical processes, information on the fate of the added nutrient,
particularly nitrogen and phosphorous, is essential. The establishment of the
nutrient budget in the pond is the basic step for the quantitative study of food
utilization efficiency, pond fertility, water quality and processes in the sediments
(Avnimelech and Lacher, 1979). The present study aims to investigate water quality,