Helllo all. Questions on calcium levels. About 2 weeks ago my calcium levels were dropping below 200 so I added some calcium. Levels then up to 300. At the same time we were having some work done on the house. Contractors were filling some cracks in house stucco and doing roofing. I did not have a cover for the pool and did notice some of the dust going in the pool. I tried to skim it off but some had already settled. Anyway my husband tested calcium today and it was 400. I know that is still within normal but I think previous posters had recommended maintaining 300 or 325... CSI today -0.03. Rest of numbers FC 5.5, PH 7.7, TA 50, CYA 40, I know I need to raise Alk a little. Would the dust from the stucco raise the Ca levels? I really did not even think of that...Thanks, Gina