Didn't get a chance to test this afternoon as we took the kids to see Cars tonight after work. I was at 11.5 at 6 this morning. I added 1 jug of bleach to get to around 14. There were people over swimming tonight when we got home. I just tested at midnight and my FC was 6. I added 3 jugs around the pool and slowly poured one in the skimmer to see if that would help kill anything in the filter. I haven't backwashed in a week due to adding CYA through the skimmer Sunday. I will backwash tomorrow morning when I get up and test again. There is going to be straight sun on my pool tomorrow and inm the 90's, with a heavy swimmer load, so I know I will lose some in the day. Whatever I am fighting sure the heck is stubborn. I have been waiting on my replacement test kit since May 3rd and am out of R-0013 to test my CYA, and my DPD powder is getting to the bottom and clumping. I may have to go to Leslie's and just buy a kit there. Has anybody else ever had to fight anything like this before? My water is crystal clear and I have 0 CC. I have been hammering away with bleach all week, and still having to do so.