I added 4lbs of CYA last Friday and have kept the pump running through this morning. I expect that the 4lbs of CYA will bring it up to about 45PPM but I did not want to add too much because I am aware of the issues if you get too much. If I understand it right 4lb of CYA will raise the levels 30PPM in 10,000 gal. I suspect that I will need to add another aproxamentally 4lb to bring the level up to 60PPM. Am I thinking right? I have also reduced the Salt generator from 70% to 60%. I was planning to test again tonight but we have finally gotten some rain so I imagine that levels are off a little at this point. As far as following what the Plaster Company has recommended that is exactly what I am continuing to do so that they cannot put it back on us. Will bringing the PH and ALK down remove the scale as they have said? This site is awesome, I have learned a lot from reading all of your posts. Thank you all very much.