Just wanted to check with the experts that have helped so much in the past ! This is the deal.. SLAM ed the pool all last week. FC is at 23ppm (and has stayed at 18ppm to 32ppm the whole time) CC 1.0 If that. New sand in the filter on March 29th (I had no Idea how long it had been in there or the amount put in by the "pool Co.") PH at 7.6 TA at 110 CYA between 50/60 (the last figures were taken before the SLAM) . All looks well..Grey everywhere (and has been for days). VAC to waste and brushing sides..Now for the problem..March 17th. is when I began and the water just does not want to clear up ?? Lets see what you all think..Polyquat ?? Good to be back !