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Hey all, I've been reading this thread and following its advice for almost 5 years now. I am a chemistry teacher who loves the amount of real science that has gone into this site. Keep up the good work!

Hey all, I have been shocking at 25ppm for 15 days. The pool was fairly green as we were renovating the house and were unable to attend to it. It has been crystal clear for the last 10 days and has passed the overnight chlorine test for the past 7 days. We have been maintaining shock for days...