Hello, just had my pool completed about 2 months ago and i've been noticing these white stains on there. In the beginning there was a lot of dirt in pool as a result of high wind and i'm thinking it may have contributed to it. I didn't think much of it until a friend who also owns a pool with blue quartz brought it up.
At first i was thinking it was algae, but my OCLT is only .5. I have never done the slam method on my pool since it open as a result of the water being very clear, and it being pretty much in check the whole time ( chemical wise). Anyone have an idea what it is and how i can get rid of it?