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I added an "automatic" chlorinator two years ago and shortly after started having problems with yellow algae. I recently bought the TF-100 test kit and with help of this site am finally starting to understand that even though I was shocking the pool with what I thought was a high enough amount...

Hi, I own an IG "low-hung" 18 x 36 pool (est. 28000 gal) with a sand filter system. I just received my TF-100 today and my readings are... FC-12 CC-0 pH-7.3 T/A-35 CH-220 CYA-50 Temp - 86 My water is crystal clear. I use liquid chlorine and I also have an auto chlorinator but I have turned...