3) NEW NATURE2 Spa Stick Mineral Sanitizer For Spas and Hot Tubs The No-Bromine Alternative Kills bacteria Sanitizes spa water Improves water quality Compatible with most spa maintenance products Designed to fit most portable spas/hot tobs Compatible with ozonators Clean, clear water without harsh chemicals No more chlorine smell or eye irritation Simply drop it into your spa filter Improves water quality, reducing skin irritation and dryness Works with your existing filtration system Hassle-free maintenance Leaves water softer and clearer Available for spas: Up to 500 gals Works with all spa flow rates Cartridge lasts 4 months Part Number: W20750 Product Condition: BRAND NEW