Introduction. Ozone gas, in nature, occurs as ultraviolet rays from the sun break down the oxygen in the atmosphere into ozone molecules. Technologically, it is obtained from the air we breathe with the help of electron discharge or pure oxygen. Ozone is used extensively in recent years for the purpose of disinfection, due to its high oxidation potential. Ozone gas, which is a raw material oxygen, is the only natural disinfectant. Aim of the study. Bromata, formed in the disinfection of drinking water with ozone, emphasizes the importance of process control.Results. It is possible to provide safe disinfection by ensuring the use of online monitored technologies.The formation of a natural disinfectant has led to the rapid spread of usage areas and their safe use. In the field of aquaculture, interest in the use of ozone for disinfection has increased rapidly in recent years. In the disinfection of waters, in the food industry, in cold air depots, in eliminating odor, in swimming pools, in color removal, in waste water treatment, in nitrite, ammonia, iron, manganese removal; Ozone gas is used in the disinfection of living environment air. Ozone is a gas with very high oxidation power and the most powerful disinfectant known. The high oxidation force plays an important role in eliminating situations that would cause ozone fish diseases. The effect of disinfection of ozone gas is 3125 times higher than that of chlorine under the same conditions. It is more effective against chord and cysts and viruses. In addition, after ozone is obtained by disintegration of the oxygen in the air, and after completing the disinfection task due to its unstable structure, it is always converted to raw material oxygen. Key Words: Water,Ozone,Bromate,Toxicity