MAUNAWAI Nitrate Protection Replacement Filter - for Peka 20 House FilterEffective protection against nitrate and contaminantsThe nitrate protection filter serves as an additional pre-filter and reduces nitrate and other contaminants—in a natural and straightforward way.Your benefits at a glanceReduces nitrate, contaminants, and odorsIdeal for MAUNAWAI Peka 10 whole-house filtration systemsNat...