💎 Activated carbon blocks certified to ensure contaminant reduction for 200 Gallons Or 6 Months, depending On Water Usage And Quality 💎 All Aquafresh Filters are tested and certified by IAPMO to NSF Standard 42 for Structural Integrity, Materials Safety, Chlorine taste, odor reduction and System performance. Does not remove beneficial minerals. Quality you can taste! 💎 Costs less than OEM filters without compromising any quality or flow rate