The Dream Tree Power Pitcher Replacement Filter. (*These Filters DO require initial activation and can be used for either the Power Pitcher or the Ceramic Conversion System). We encourage everyone to change their filters every 3 months, or 500 gallons, to make sure they are always receiving the optimum benefit our Power Pitcher has to offer. These filters will require regular cleaning with a solution of 30% vinegar and 70% water. They are designed to effectively treat more than 500 gallons of purified water. When it's time to replace the filters, all you need to do is choose this option because your Power Pitcher, that kills bacteria on contact, is designed to last a lifetime.