I have learned so much information from this site and today I was able to use it. I went to the "pool store" that had given me so much bad advice, only because I was in the area. I told them that I need some cyanuric acid. They said "Oh you mean Muriatic acid?" I said "No that is to lower the PH. I need the cyanuric acid to prevent the sun from lowering my FC." They asked me if I brought pool water to sample. I said, "Oh no thanks. I do that myself now." They said, "With a Wal-mart kit?" And had that, "you don't know what you are doing" look. I smiled and said, "Nope I have a Taylor K-2006 test." Then I looked at the other customers and said, "You really should check out troublefreepool.com. It would save you tons of money and frustration. Then I turned to the owner and said, "Oh well guess I'm off to Wal-mart to get my stabilizer." And walked out the door with the biggest smile on my face.
Thanks again for educating me and allowing me to take control of my pool rather than it controlling me.