Zodiac W28155 Nature2 Mineral M-Style Cartridge Replacement for Algae Control

The Nature 2 Type M-25 Replacement Cartridge is designed for Nature 2 Claritec N2CM Mineral Sanitizing Systems. For all Nature 2, Claritec N2CM Mineral Sanitizing Systems Designed for pools ranging between 5,000 to 25,000 gallons Lasts an average of six months Standard cartridge design The Nature 2 Type M-25 Replacement Cartridge is designed for Nature 2 Claritec N2CM Mineral Sanitizing Systems. For pools ranging between 5,000 to 25,000-gallon pools, it lasts up to six months and offers premium mineral sanitization for a more natural way to clean your pool. The Type M-25 Replacement Cartridge is a standard cartridge, designed with two posts, and fits into standard vessels for installation.