The Nature2 Express Mineral System reduces chemicals in above ground and in ground pools.  Every six months replace the Nature2 Cartridge.  Water care as easy as 1, 2, 3!

The previous part number W26775 is no longer available (it was a 12-pack).  So if you are looking for W26775, you find the replacement which is now called W28175.  The 12-pack is no longer available, but you can order as many as you wish.