I have been maintaining my own pool using the information on this site since the beginning of June. It has never looked better and I am getting the hang of it. My CH has been holding steady at 300 since i started. But over the last 3 weeks, it has slowly started dropping off. It measured today at 250. Where does it go? Does the pool use it? It has been raining a lot over the last few weeks and I have been dumping the excess water. Did I just answer my own question? Do I need to add more CH to bring it back up as I dump water?
Thanks for the Help: