Average weight of tilapia was presented in Fig. 2. T3 growth was better than that of T2 and T1. During the experiment, the fishes were fed 3 % of body weight and the amount of feeding increased following the increase of fish weight each week. The average consumption of feed from the beginning to the end of the experiment ranged from 12.40 ± 0.14 to 29.10 ± 2.35 g/day.