Thanks. It's a gunnite pool and I didn't mention my salt level because my generator reads 3200 (just shy of the recommended 3500). But I've been suspicious because I've added a lot of water (to replace evaporative losses and splashing/carry out) and haven't added salt for a couple years. Just got some test strips and they read 2500.

But now I am confused and need the help of a chemist. You said that turning down the output of my SWG would "reduce how quickly the pH rises." Are you saying that the SWG somehow makes the water more basic? You don't happen to have a chemical equation to feed my curiosity do you? I suppose it doesn't really matter but I've always wondered why I need to constantly add acid.

Steve