SWG - ph always normal?

[PatL34]

Nater,

I am trying to relocate an article that help me develop the chemistry of the SWC operation. Sorry about the wait. There is a definite correlation between SWC performance and pH, and it is that at 7.2 pH the SWC works best, and at 7.8 pH it is at its worst. That is why I like to work between 7.2 - 7.6 pH.

As I said earlier, I need to find out why a vinyl pool SWC is more stable than a plaster pool SWC, aside from the pH rise, that is expected with a plaster pool. This is still bugging me.

Pat