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I just started getting a lot of calcium dust in a couple areas on the bottom of my pool. Something is obviously off but I can’t see where. I have had an issue with my SWCG increasing chlorine levels, but I believe I have that under control. With the pool math attaché below, is this enough...

We have a salt water pool and are in our third year of ownership. We just opened the pool for the summer months and I have things pretty well under control I think. I test PH daily and this year I find that the color in the comparator creeps darker - higher ph - as the water sits in the vial...