The filter lasts at least 30 days and filter about 100 liters of water. Thanks to the unique patented 5-ti-stage filtration process removes Aqua Optima filters impurities from tap water. Reduce the content of herbicides, pesticides, chlorine, heavy metals and prevents the formation of scale in kitchen appliances. Hot and cold drinks are tastier then. The filtered water system Aqua Optima is smooth and free of unpleasant flavors, its use improves the appearance and taste of cooked vegetables.