We have been using CuZn for a few years in our 300 gallon, Hot Springs tub that we bought new in 1997 (plus 15 g potassium monopersulfate salt weekly and continuous ozonation). This product seems to work great - we have not used halogens in over ten years, my wife and I use the tub every night, and have never been ill, and the water looks perfect. I replace the CuZn 2x year when changing the water (we do not use tub June/July/August). What I want to know is exactly how the CuZn works - ie, exactly what are all the electrochemical, aqueous, biochemical and any other reactions going on that the CuZn takes part in - all balanced reactions and products, in as much detail as possible? My son and I are both chemists, but have little idea what is going on. Apparently the ozone and monopersulfate salt do not damage the CuZn matrix, but chlorine does. I have emailed the company asking this but no answers. Thanks in advance.