(3) Nature2-The Natural Spa Purifier for $57.99

The Natural Alternative to Chlorine (and Bromine too!)Lasts four months Specifications: * 9 out of 10 spa users prefer Nature2 over their old method * Capacity: for spas up to 1,000 gallons * Run time: minimum 4 hours daily * Flow rate: works with all spa flow rates * Installation: Drops into the core of most spa filters, works with suction-side and pressure-side filters