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Hi everyone. Over the last two weeks, there has been a lot of rain here in Houston (well, more than two weeks) and a lot of pollen got thrown into my pool. It turned green, so I brushed it and put some shock (the one with CYA) yesterday. It looks much better, but I noticed that it was very foamy...

Hello, I have a gunite pool with many black algae spots and some mustard algae. My CH is also at 550 causing some calcium scaling (it's not too bad). I tested my fill water, and it is at CH 200. I think my pool could greatly benefit from replacing some water. I am thinking because there is so...