30% & 40% Crude protein Throughout the experimental trial there was no issue of physico -chemical parameters was observed and the figures remained in the normal range. The statistical analysis showed non-significant relationship of water quality parameters with one another and the graph of correlation coefficient showed statistically non significant bars among the both trials of L. rohita fed 30% and 40% C.P feed . The higher activity of amylase was observed i n the liver of fish as compared to the intestine of fish fed with 40% C.P feed. The amylase activity showed highly significant results between the both treatments. The higher activity was observed in the fish fed with 40% C.P feed although there was non significant relationship between the replicas. The little activity of lipase was observed in the liver in comparison to the intestine of fish fed with 40% C.P feed. Highly significant results were observed for the activity of lipase between treatments and replications.