With the development of aquaculture, the disease caused by the pathogenic microorganism happen occasionally, which do harm to the aquaculture industry. Except for enhancing the management of the facilities, it has been an impor tant subject to eliminate the pathogenic microorganism in the feeding water and instruments. Ozone, as  it  is  strong oxidant, disinfectant and catalyst has been widely used not only in the industry, but also in water disinfection, water quality improvement and preventing the pat hogenic microorganism in aquaculture and red tide. The pathogenic microorganism can be prevented by using ozone system to disinfect aquaculture water and facilities.

As ozone has high efficiency in disinfection, water purification and do not cause undesired by-product, it is the ideal disinfectant for aquaculture. The investment of using ozone system in aquaculture breeding is not high, and it saves various disinfectants, antibiotics, decreases exchanged water, increases the breeding surviving rate to at least two times, produces the green & organic food. Hence, it is quite economic. At present, using ozone in aquaculture is  quite comm on in Japan, America and European countries.