I finally got around to opening the pool. I drain and refill every year. There is always about 3 inches of gunk I can't get out. I removed all I could and filled. I am slamming now. But my question is, is there an advantage to holding off on the cya until slam is done to save on chlorine because I am slamming at a lower rate. Or is the sun's consumption of the chlorine going to out weigh the savings? I'm in southeast pa full sun. And have no cover.