One of the musts of a pool is the automatic disinfection system. There are always risks in pouring the chemicals manually to the pool.  Automatic disinfection systems keep the water more drinkable compared to manual systems and kill all the microbial bacteria and virus in the water that will cause disease. There are indispensable conditions for pool water disinfection. Firstly, disinfection made into the pool must be made regularly. Secondly, organic dust that can not be kept by the filter must be removed by the disinfectants. And finally, the disinfection efficiency of the pool water must be tested with a simple and reliable method. There are many ways to make disinfection in the pools including automatic systems. These are chlorine dispenser, chlorinator, ozone generator, dosage pumps, pH-orp automatic control panel, salt-chlorine generator. Whatever system you use, you must always use acid and alkali chemicals for the pH value of pool water. Without balancing the pH value, it is not possible to keep the pool water in balance. It is compulsory to use algae prevention products and to make high levels of chlorine shocking process from time to time. That means for disinfection, a certain amount of chemical use is obligatory. The use of more than less chemical will not give the desired result and excess chemical use creates serious health problems. As a result, these chemicals must be added to the pool by the help of an expert.