I have never had this problem before and am getting frustrated! It has been pretty hot here and no rain at all this summer. I test the water every other day. The numbers look fine then all the sudden I will be in the pool like happened on sunday and a hunk of algae floats by me. The water is crystal clear and sparkling. This happened twice before. Shocked the pool got the numbers perfect again and a week later I was laying in the pool and another hunk of algae floated by.... What is going on?? Its never dropping in chlorine. I have an automatic chlorinator running just to be sure because Im getting so frustrated.

My last numbers I had were wacky because I was shocking but I can tell you that the CYA is sitting about 15-20 right now. I used a power shock this time because it was actually only at 13 so I wanted to bring it up a bit and figured that was a good way to do it. Any suggestions? Not sure if this is enough info.