SunPurity Generic Mineral Sanitizer Purifier Cartridge for Sundance Spas Sun Purity<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Mineral system purifier for Sundance Spas</li><li>Effective &amp; Economical alternative to SunPurity cartridge</li><li>Mineral purification is a natural process that carries out 3 functions: disinfection， algae prevention and clarification</li><li>Reduces chemical and chlorine usage</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41oeOP7x-4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61ALCvAkzRL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/313ey%2Bskx-L.jpg" noproxy>