White splotches and lines appearing on blue/gray plaster
Our blue/gray plaster is now covered with white spots, splotches, and lines. Asked the pool builder about it and was told it was probably caused by shock not dissolving entirely before settling on the bottom. Problem is, we have never had a need to shock the pool and... the white splotches and spots are on the sides which means we'd have to be pretty talented to get it to settle on the vertical surfaces. Pool builder was supposed to come out and have a look but haven't heard from them (not surprised either). This pool is less than 3 years old. The areas of stains are very smooth like the rest of the plaser and doesn't appear to be any kind of build up. Does anyone have any idea what this might be?