Recently had a fiberglass pool installed and concrete poured and apparently the mix had calcium chloride in it which caused the entire 1600 sq ft patio and coping to be discolored and severe black spots everywhere. I’m not sure of the remedy at this stage but afraid there isn’t a remedy other than bust the concrete out and repour or put pavers on top of the current concrete. I’m devastated and at a loss bc concrete contractor isn’t responding and pool company says the black spots will fade with warm weather but what I have read they are permanent and will get worse. It has been 45 days since original pour. Recommendations to remedy?
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