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Never encountered calcium buildup in the filter in seventeen years of maintaining my pool until last Friday. Massive amounts of buildup on the grids but I was able to get it off with a detergent soak followed by diluted acid application. My chemistry balance has never been an issue; pH...

Performed a chemical analysis this past weekend suspecting CH problems now that I have scale for the first time in 12 years. FC & CC = 13, pH = 7.5, TA = 100, CH = 330, CYA = 120 ( I know this is high and am working to reduce it). So my question is why do I have a scale issue if my CH is...