Check the listing for details. Nature 2 W29500 CF Replacement Cartridge. Condition: New. Listed at 113.39 USD. Nature2 CF Replacement Cartridge W29500 mineral pool sanitizer uses copper and silver to destroy microorganisms, bacteria, and non living organic waste. Experience a revolutionary approach to sanitizing your in-ground or above ground pool. Nature2 CF drops right into your pool cartridge filter, making it easy for you to enjoy the benefits of mineral technology without any installation or special equipment purchases.Nature2 CF works automatically with the pool filtration system and requires no electricity. Its mineral technology reduces chlorine level requirements, improving the look and feel of the pool water. Note: This Nature2 CF Replacement Cartridge W29500 contains one replacement cartridge. This is a single unit cartridge for the Nature2 CF Replacement Cartridge W21500 four pack. Powered by Frooition Frooition | No-js Template | eBay design, eBay store design, eBay shop design, eBay template design, eBay listing design (ver:froo_no_js) This listing is currently undergoing maintenance, we apologise for any inconvenience caused.