Survival Rate and Food Utilization Rate of the Red Nila Fish (Oreochromis sp) Utilizing synthetic feed additives Seaweed (Gracilaria sp)

In the fish farming business, feed is highest operational cost, which reaches more than 60% of total production cost. Therefore, can be processed independently to reduce costs in aquaculture businesses. This study aimed determine survival rate and efficiency red tilapia (Oreochromis sp) fed artificial with addition seaweed (Gracilaria sp). research was carried out from June September 2021 at Integrated Laboratory Khairun University. used four treatments, each treatment repeated three times. The tried A (Artificial Gracilaria sp 10 gr); B 20 gr; C 30 D without sp.). variables included calculating (SR), Feed Conversion Ratio (FCR), observing water quality during study. value 97.78%, while lowest 73.33%. conversion ratio D, 1.97, followed by treatments B, 1.48, C, 0.64. results measurements study, namely DO, range 6-6.8 all pH ranged 7-7.6, temperature 28-290C. best (SR) tilapia-fed (FCR) 0.64 g.