Quote Originally Posted by chem geek View Post
The other time the acid and base demand test is useful is when one is unsure of the pH reading. The acid and base demand tests let one move the pH color up and down to see where the pH might have been.
Yes. I'd forgotten about that one, but I've used that on occasion as well. And, that is a valid use.

The other issue, of determining how much acid to add, from a PoolForum point of view (what to tell newbies) rather than a personal view (what I might myself do), I strongly prefer a standard dose of acid or base, followed by a test, followed by a re-dose.

Among many other things, I think handling it this way is easier to learn and tends to indoctrinate newbies into the need to manage their pool on a regular basis.