Interest in commercial of Tilapia sp. to meet the human needs is steadily increased. In situ, the common processes including re-newing of water by changing about 25% of water volume to re-new the growth medium. This process removes a part of nitrogenous fish metabolites mainly ammonical nitrogen, decreases the acid reaction (pH) and increases dissolved oxygen (DO) and zooplankton communities. In a pond of 16000m3 capacity, about 4000m3 of water must change every two weeks, which in turn increases the production costs including labors, power and water requirements.