Thanks for your quick replies! Ok, so how do I reach and maintain shock level if my CYA level is 0. According to the pool store it was 9 (that was Sunday) Isn't that the stabilizer? I have been maintaining chlorine level overnight, and then losing it during the day. I am sorry for my stupidity here...I have been doing as much reading on this website as I can! I have the FROG mineral reservoir, and thought that was supposed to be helping with maintaining a chlorine level, if so, it doesn't seem to be doing much.

As for the scale, I can't really break of a piece. It did seem to brush off easier when we brought the PH down.