Shrimp aquaculture as one of the most important activities in the world and Iran is expanding. Bacteria and fungi of the most common infectious agents causing diseases are in the hatchery and shrimp. The most important bacteria causing diseases in the hatcheries and shrimp Farms, bacteria are Vibrionaceae family. The fungi can be identified as Fusarium, Mucor, Cladosporium, Aspergillus, Penicillium and yeast. Utilized of water supply system in this project for breeding and reproduction of shrimp is a controlled system. The purpose of this action, control and stabilization of water quality during the breeding period and in all sectors. This system act as a part of biological security. Incoming water before the utilization was monitored for the total bacteria count, fungi and as well as Vibrionaceae family, each 15 days. If contamination is too predictable, additional tests and necessary treatments were carried out to improve the quality of the water. The water, after use in the system and after passing through the filtration system, was guided out
