DurhamHouses,

Keep in mind that these are pool forums aimed at residential pool owners, little self-help communities. There is a definite "dynamic" that exists within these forums. I think it was PoolDoc, in an earlier version of this board, that said "As I rule I'm right and you're wrong." The underlying aspect, the common ground in all of them is that the participants don't know what they don't know. From that starting point discussions can go anywhere.

At the end of the day it's just a forum.

I can have a graph by one of the manufacturers that shows the absorption of water by a liner as a function of pH over time:



But then you'll have somebody come along and question it, or say it ain't valid for whatever reason, without any background knowledge or knowing the context.

Then a decision is made, like what just happened, to favor another bit of information, or another source, hence the information is never complete, and that decision forms the basis for what now becomes the accepted answer, the "truth".

Like I said, it doesn't matter, really. It's the nature of forums. Just let it go.