Mineral Sanitizers for Pools Mineral Cartridges “Fusion/DuoClear ® ” Cartridges For use in DuoClear salt water chlorinators and Nature 2 ® Fusion systems W28000 DuoClear 25 Cartridge for up to 25,000 gallons (single unit). Order in multiples of 4. Previous part # W6000 (4-pack). W28001 DuoClear 35 Cartridge for up to 35,000 gallons (single unit). Order in multiples of 4. Previous part # W26001 (4-pack). W28002 DuoClear 45 Cartridge for up to 45,000 gallons (single unit). Order in multiples of 4. Previous part # W26002 (4-pack). “G” Style Cartridges For Professional G, Pro G Plus Part No. Description W28125 G25 Cartridge for pools up to 25,000 gallons (single unit). Order in multiples of 4. Previous part # W26725 (4-pack). W28135 G35 Cartridge for pools up to 35,000 gallons (single unit). Order in multiples of 4. Previous part # W26735 (4-pack). W28145 G45 Cartridge for pools up to 45,000 gallons (single unit). Order in multiples of 4. Previous part # W26745 (4-pack). “A” Style Cartridges For Aboveground A, Pro A plus W28165 A30 Cartridge for aboveground pools up to 30,000 gallons (single unit). Order in multiples of 4. Previous part # W26765 (4-pack). “Express” Style Cartridges For in-ground and aboveground Express vessels W28175 212 Express IG and AG Cartridge for up to 25,000 gallons (single unit). Order in multiples of 12. Previous part # W26775 (12-pack). 2015 Zodiac Pool Systems, Inc. Product Catalog