Thanks Carl. That clears it up for me.

One more thing. Should I not be using Baking Soda at all with an AG vinyl liner pool? Is alkilinity not basically for concrete and such? Are pH and chlorine levels not all that I'm to be essantially concerned about?

If this is so, then can I not maintain a healthy and happy pool with just bleach and borax (and, of course, CYA which is generally ok year round)?

Thanks again.