摘要：The problems of tilapia farming are the high feed costs and long cultivation time. Feed costs is in the ranges 60-70% from the total cost. Probiotics in the digestive tract will improve the digestion and absorbtion of nutrients. This study was aimed to determine the effect of probiotics on tilapia growth and feed conversion ratio (FCR). This study used a completely randomized design with 4 treatments i.e. 0%, 3%, 4%, and 5% (v/w) of probiotic in feed. Probiotics was sprayed into comercial pellets. Tilapia were cultivated for 2 months given by commercial pellets with different proportion of probiotics. The parameters measured were the growth of fish (fish length and fish weight), Survival Rate (SR) and FCR. Data was analyzed by ANOVA. The results showed that the addition of probiotics dose 0%, 3%, 4%, and 5% (v/w) did not affect significantly to the growth and feed conversion ratio for 8 weeks
