who reported that increase in dietary supplementation of probiotic or periphytic algae in shrimp diet do not increase proportionately the digestive enzyme activities and growth of shrimp.Moreover, reduction in growth rate of fishes was recorded at higher level of microbial supplementation (Ajiboye et al., 2012; Kiessling and Askbrandit, 1993) as microbial products at higher level tend to reduce the feed palatability and digestibility (Kiessling and Askbrandit, 1993).