DISCUSSION
In intensive and semi-intensive aquaculture practices, high stocking densities of fish along with intense feeding and fertilization often leads to the deterioration of water quality and proliferation of pathogens. These are the major constraints in fish culture. In the present study, water quality parameters of the ponds treated with probiotics were observed to be good which might be because of the various roles played by the microbes. During the period of observation, the amplitude ofvariation in water temperature was very narrow (Table 2) which is considered to be a characteristic of tropical