(3) Nature2-The Natural Spa Purifier
The Natural Alternative to Chlorine (and Bromine too!)Lasts four months9 out of 10 spa users prefer Nature2 over their old methodSpecifications:Capacity: for spas up to 1,000 gallonsRun time: minimum 4 hours dailyFlow rate: works with all spa flow ratesInstallation: Drops into the core of most spa filters, works with suction-side and pressure-side filters