Seven years ago, it was actually a pool store associate that helped me find TFP. Not on purpose; it was in the middle of my second season with a pool. He told me that my CYA was at 68, and that I should stop using stabilized chlorine trichlor tablets and start using cal-hypo tablets, and keep up the weekly so-called shocks with cal hypo shock. He said that instead of buying the trichlor tablets, I should instead buy a 5 gallon bucket of cal hypo tablets or find someone to share them with. I have an 18' AG pool. Anyway, I decided not to buy that huge bucket of tablets and left. That whole mess intrigued me. I came home and started Google searching this high cyanuric acid thing. I wanted to find out how this happened. How my pool had gotten too high of any level when I had been following their advice to a tee. The google search led me to troublefreepool.com; and I started reading and found out why this had happened and why it doesn't have to happen; how the pool care industry was wrong in many of their techniques and management strategies; and I learned how to care for pools the trouble free way. Back then, I had know idea what I was doing. Would take a sample to the pool store; they'd give me products to put in my pool. I thought that the closer I followed their advice, the better off my pool would be. I'd keep the pucks in there and weekly shock with cal hypo; regularly bring in a sample; they'd explain my report and tell me what to buy and put in my pool. I followed their advice. They never sold me a bunch of unnecessary chemicals; I have to give them that much, except for calcium hardness up for a vinyl pool; and at least they do warn people about high cya; but they don't carry liquid chlorine, and they do not subscribe to the chlorine/cya chart or any sort of ratio of fc to cya. Thank goodness for TFP