I have a one year old 18,700 plaster pool with a SWG so my ph always rises and needs to be knocked down every week. My pool was closed a week ago (I live in NJ) and out of curiousity I check the PH level after undoing a few straps to get to the water and the PH is now b/w 8.2-8.4. It was 7.6 when it was closed. My alkalinity is still 100. Is there anything I can do to adjust the PH and avoid scale problems in 8 months? Or am I stuck since I can't circulate the water. I heard muriatic acid will just sink to the bottom and scorch the plaster without the water circulating. Any ideas, much appreciated.