I have read, reread pool school and know all the basics. Used BBB to a tee last year as first time pool owner, love you guys/girls. This year I have been clearing my green swamp for a week and a half. Holding overnight FC at 15 for several days, with CYA of 30 with a sand filter and cloud will not clear up. I have a bottle of floc in my hand right now. Please stop me or give me and OK... I am at the edge of the abyss with my 5 kids dying to get in the blue cool pool. Can you give me a quick answer?