Nature 2 is a water purification technology for spas that gives the purest, clearest water imaginable, with virtually no odor. It works using a silver catalyst to kill microorganisms. Lasts 4 months. From Zodiac.
Less harsh chemicals are needed to keep your hot tub water sparkling clean. You'll experience no red, burning eyes, irritated skin or discolored hair, while spending less time for spa maintenance since it dispenses just the right amount of sanitizer automatically.
Installation: The Nature2 spa purifier is installed inside your hot tub's filter cartridge. It works on both pressure and suction type filtration systems and is effective on spas up to 1000 gallons. Your spa should be circulated a minimum of 4 hours daily to be effective. Easy installation of Nature 2
NOTE: Your filter cartridge must be at least 8" long, and have a hole diameter of at least 1 1/4" to accept the Nature2 purifier cartridge.