I am a new pool owner and I have an issue. Around the waters edge of the pool right above the water there is a white line which I am assuming is some sort of calcium deposit (see picture). Since it is rock and not smooth I imagine it will be difficult to remove.
What is the best way to clean this? The pool has required very little maintenance all summer but the ph did get a little high (8.2) recently. Would this happen because of the ph being high?