Rev,

Are you sure you don't have those numbers reversed? pH=8 and Cl=21-32?

Even if you do, the pool store is incorrect.

This post points again to how important it is for everyone to have a decent test kit and understand what the results mean.

Rev, the process will work and I'm sure the pool store guy is a nice guy....but, he's misinformed.

Double check those numbers and get a complete set of test results....pH, Alk, FC, TC. That'll do more to help you get back on track than anything you put in your pool without testing.