Weekly (Mean ± SE) variations in condition factor in control and treatment groups of grass carp (Ctenopharyngodon idella). Diet of treatment group A, B and C contained 5% of linseed flour, 5 % linseed oil, combination (2.5 % linseed flour + 2.5 % linseed oil), respectively. Trial continued for 36 days (April 5 - May 5, 2017). Control group was fed with soybean feed. Initial: Pre-treatment value, W1: first week post-treatment, W2: second week post-treatment, W3: third week post-treatment