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

[nater]

Here's an update. I am now seeig a gradual increase in pH over several days. My Chlorine demand is much higher now that we're swimming alot and the weather has been very warm and sunny. I'd say my pool now more closely resembles the SWC model you're familiar with.

Typically I'll wait for it to creep up to 7.6, then I have to dose with a full gallon of Muriatic acid to get back to 7.2. After that I've been good to go for 1-2 weeks.