ABSTRACT The research was carried out for 56 days, the aim to analyze the effect of giving rumen of cow on feed with different doses with the utilization of leaves water hyacinth on the growth of River Carp. This study used a Completely Randomized Design (CRD) with 5 treatment levels and 3 replications which included P0 (without the addition rumen of cow ), P1 (addition rumen of cow at a…