Here's the deal: Pool is clear, but for the last couple of weeks, chlorine numbers have been in the .5 - 1. range for FCL and .9 - 1.6 TCL. My CYA was at 30 so I added 6# to raise it to approx. 60PPM, it's at 38 today. Yesterday, I added 2.5 gals of 12.5% shock and 3# of powdered shock since...