Use of probiotic is the best way to maintain the gut health of the fish and stay away from diseases like white gut disease. It helps in maintaining the microfauna balance in the intestine of shrimps and fish. Certain conditions like external stress, antibiotic treatment, high stocking density, low DO levels etc, adversely affect the microbes present in the intestinal niche. This in turn reduces the beneficial, health-promoting bacteria. You can check out BioGut Aqua which ameliorates the overall health of shrimps and fish and induces proper molting cycle in fish and shrimps.