This system uses the excellent disinfecting effect of chlorine, but still offers the  Possibility to bathe in chlorine-free water during regular operation. 
After  a certain amount of chlorine is added to the pool water during the weekly backwash process.  After 3-6 h circulation the precisely calculated amount of active oxygen is added, which removes the chlorine that is still present in the water. In combination with copper ions or a UV sterilization system  no more chlorine is needed for the entire week and a very high degree of processing safety is still guaranteed.