The FreshStart Clean Screen Water Pre Filter can be used to ensure water is as clean as possible when filling your spa or hot tub. It can be used on any Hot Spring, Hot Spot, Limelight, Caldera, Solana, and Tiger River spas. The hotspring pre-filter traps organic contaminants, metals and tannins so that they are not present in spa water. It doesn’t have any silver ions so can be used with any chlorine, bromine, or biguanide water care routines. Decreases the need for additional chemicals meaning less maintenance work involved.