2 Pack Nature2 W28125 Replacement Mineral Cartridge for G25 Pool Sanitizers

Nature 2 mineral purifier replacement cartridges release the same minerals found in nature to control bacteria, algae and viruses. Significantly reduces the amount of chlorine and chemicals needed to maintain your pool water. For in ground pools up to 25,000 gallons. Cartridge will last for approximately six months. Zodiac Model: W28125. Pack of 2