ABSTRACT This study was carried out during the season of 2014 at the Central Laboratory of Aquaculture Research, Abbassa, Abu-Hammad District, Sharkia Governorate, Egypt, to evaluate effect of different aeration systems namely air stone, shower, vinture and agitation systems on Nile tilapia fingerlings (O. niloticus) growth performance and water quality. These aeration systems were used under different stocking densities of 100, 150 and 200 fish/mP 3 P and different feed frequencies (once and twice daily), under intensive condition of aquaculture and taking into consideration the net profit. The obtained results revealed that the shower aeration system exhibited the highest net profit 3.2, 28.5 and 53.7LE/mP 3 P, with all fish stock densities, compared with other systems. It is also maintain water quality parameter in safety limits for success aquaculture, the data obtained with shower system, fish density (FD) 100 fish/mP 3 P and feed frequency (FF) twice daily for dissolved oxygen (DO), NHR3R and pH were 6.31mg/l, 0.014mg/l, 7.49, respectively. And for final weight, feed conversion ratio (FCR), relative growth rate (RGR%), specific growth rate (SGR%) and survival rate %, the data were 34.7g, 1.24, 330.2, 1.69 and 95, respectively. Key words: Aeration systems, growth performance, water quality, total cost.