Manual dosing of liquid or granular chlorine can be hazardous. Over dosing can cause eye irritation, itchy skin and a strong chlorine order. The AstralPool VX salt chlorinator continuously generates the precise level of chlorine required into your pool. With the convenience of a touch pad the level of output can be adjusted and operating hours can be preset. With the self cleaning ability the VX Salt Chlorinator is perfect for any pool and spa combination.