Sundance SunPurity Mineral Cartridge for Spas Sundance Sunpurity Mineral Sanitizer Cartridge for Sundance Spas Mineral purification is a natural process that carries out 3 functions: disinfection, algae prevention and clarification Sundance Spas Mineral Sanitizer Cartridge leaves your water clean and clear SunPurity by Sundance Spas helps reduce the potential for unpleasant odors and residue lines, and can be used with your hot tub ozone system. Original Sundance Spa Parts.