During water intake to the culture pond, water should be filtered using a net of more than 60 holes/inch or twin bags 60 holes/inch mash at the water inlet point to avoid entry of virus carriers such as crabs, wild shrimps and zooplankton and also to avoid entry of fish or crustacean, which may be predator or competitor for shrimp. The suction line should be placed at the deeper side of the reservoir pond and the foot valve of the pump should be kept at least half a foot above the pond bottom to avoid turbidity during the pumping process.