PoolRx brand cartridge fits Sundance Spas, a compatible replacement for the SunPurity 6890-780 cartridge. Effective organic minerals make spa water sparkle for healthier bathing. Works with a constant low level of chlorine - just 0.5-1.0 ppm for residential spas.

• Compatible replacement for Sundance SunPurity
• PoolRx brand
• Lasts up to 6 months

Product notes: Install into Sundance spa filter gate's SunPurity cartridge chamber. Normal water balance and chlorine residual is required. For other spa brands, use the PoolRx+ Yellow pod. Sundance® is a registered trademark of Jacuzzi Brands, LLC.