O.K, so I thought that I wasted my money with this ozonator that the pool store convinced me to buy, but I'm starting to see the benefits from having this. I have been testing my water up to 3 times a day just to get an idea of chlorine demand, and see how stable my PH is etc..., a couple of times I have noticed my FC less than 1ppm, and my CC greater than 1PPM, I then turn on the ozonator for about 3hrs, and re-tested, both times the result was FC 2ppm, and CC 0ppm, so it seems it is helping free up my chlorine and allow me to limit my chlorine use.