REPLACEMENT FILTER FOR AQUA IONIZER DELUXE PRO MODEL | Designed for Aqua Ionizer Deluxe Pro. OEM Official Replacement Filter | Includes one Series 2 replacement Functional Compostie Filter for Aqua Ionizer Deluxe Pro. Does not include Series 1 replacement filter. High Quality NSF-Rated Filter | Removes rust, sediment, dust, chemicals including chlorine, phenol, Trihalomethanes, and more from your water when used with Series 1 replacement Filter. FILTER CAPACITY | The filter cleans and treats 4,000 liters of water.