What are some of the pitfalls that cause high combined chlorine? Or better yet, what is the best way to avoid having it build up? I have to admit, there are times when I don't check my FC for several days and then have it drop to nothing and then seem to be playing catchup = could that be causing my high CC? I have a very hard time keeping mine down, it seems that every summer it will creep back up to 4 or 5 PPM. Also, are there any other ways to get rid of it once its up there other than super chlorination? Things like manipulating the ph or letting the pool get more sunlight. I have a safety cover so my pool spends just about the entire week under cover with no light. Other than super chlorinating it seems that if I "air the pool out" so to speak by leaving it open for a couple of days I can get it back in check.