The experiment was conducted at wet lab of Department of Aquaculture, Central Institute of Fisheries Education,
Mumbai, India. It consisted of four treatments, each having three randomly assigned replications. Different water
circulation hours i.e. 4 hrs/day, 8 hrs/ day, 12 hrs/day and 24 hrs/day were assigned as four treatments, T1, T2,
T3 and T4, respectively. Regular water exchange was followed in Control set in glass aquaria with three