I've been a pool owner in northeast PA for 22 years, a lifegaurd/pool cleaner/water tester before that, and I thought I knew it all. Turns out I had relatively little knowledge and probably a whole lot of luck. Lately some persistent problems drove me to seek out this forum and I am finding out how little I really knew. Now I'm learning the science and benefiting from the community experience and knowledge.
So, thank you all, and I look forward to an education to help free me from future pool troubles.