Nature 2 Spa Mineral Sanitizer Size:1 Cartridge patented blend of algaecides specially

patented blend of algaecides specially formulated to control black algae and other equally resistant strains

and other pool issues

but it will maintain pH and alkalinity

helping protect children

Ideal for backyard pools and equipment rooms

Nature 2 Spa Mineral Sanitizer Size:1 Cartridge patented blend of algaecides speciallyNature 2's Spa Mineral Sanitizer provides spa owners with a real alternative to traditional chlorine and bromine sanitizing systems, using its patented mineral bed technology to maintain spa health. Spa Purifier's formula improves the look, feel, and smell of spa water by reducing the need for sanitizing chemicals, yet does not compromise the overall health of your spa. Use this product after a fresh refill or at start up. Installation is as simple as