well i checked my cya after my water drain a pretty much no change. Still 100 I remember my builder saying that he put the skimmer in higher so that I can have a higher water level. Maybe I have more than 20000gl. Anyways, I guess Ill maintain the high fc level and see what happens next year. The pool is clear but with the rain and sun my levels drop more than i thought. Can someone tell me if my cc is less than 1 (all the time) and my fc drops 4-6ppm (daily) does that mean i have a problem or is that normal. Being said with a high CYA Thanks