Thanks for the reassurance. I'll keep doing what I'm doing. By the way, he also told me that the sticks provide just the right amount of stabilizer for the chlorine in them to use up! How can someone who has been in the business of building pools for so many years not understand the chemical stuff? Is that because they believe what the pool chemical manufacturers tell them?

By the way, he said EVERYONE he knows had a terrible problem with mustard algae this year. Guess so, since he's teaching them to run their pools with high CYA/low Chlorine levels. He seemed really skeptical when I told him I had eliminated my little bit of mustard with high Chlorine levels for several days in a row.