Has anyone had any success with using a product called Bio-Active for reducing very high CYN levels....it has been on the market for 2-3 years now. I have tried it but not have had any success with reducing my numbers which hover around 150 ppm....I was thinking of trying it one more time, before it gets really hot out here in Phoenix, but I know this product sucks the chlorine out of the water, and creates a chemistry imbalance that lasts for 2-3 weeks, not to mention cannot get the chlorine back to normal levels....which has been my experience. Thanks for your response!