Supplementary feed is that which is provided to fish to make up the deficit between natural food availability and their nutritional requirement for good growth and production (De Silva, 1993). In rohu culture, supplementary feeds are required for larval rearing, fingerling production as well as for grow-out in semi-intensive systems. Rice bran and groundnut oil cake at the ratio of 1:1 are most commonly used for rearing larvae to fry and for fingerling production. No supplementary feeds are provided in low input/extensive systems. However, for medium input /semi-intensive systems, irrespective of natural productivity, supplementary feed must be provided. Under experimental conditions, Mitra and Mukhopadhyay (2002) demonstrated that the use of supplementary feeds results in improved nutrient utilization and fish performance.