I've read most of the similar posts on what is normal chlorine usage. Still haven't seen a straight answer as to what is "normal". I know every pool is different, but I'm wondering if my usage is normal? My test results have been pretty steady since I had the installation done a couple weeks ago. This evening FC-4ppm, ph-7.4, CYA-45. I've got a 10,000 gallon, AG, with a DE filter, and 1 hp pump. I live in MI and we've been pretty warm (upper 80's), with a recent drop in temp (high 60's and rain.) I've been adding about a quart of 10% bleach every night as FC drops to about 3-4ppm every day. Is this a normal fluctuation and will I be using this much chlorine from now on? Just wondering if there is a simpler way? Water is crystal and hasn't had much usage the past week or so. Thanks, Andy