Well put, Richard!

The far cheaper alternative, and more effective, too (to using the N2 + Jack's Magic), is to use your K-2006 test kit to test your CYA level weekly, and check your FC and pH level daily. A simple OTO/Phenol kit will make doing that easier than the K-2006, and you can run the FC, CC, pH, TA, CH and CYA tests weekly using the K-2006.

Then, when your CYA hits your target level, you stop the tablets, and begin using bleach or liquid chlorine to maintain your FC levels at the range recommended in the Best Guess table.
To control rising pH (if you still have it), you ca use Muriatic Acid, available at most hardware stores, or generic Dry Acid, sold at pool stores, K-Mart, WalMart and, I think CostCo.

Once your pool is cured, the rising pH should end.

You won't have metals, your pool will be clean, and you'll save beaucoup bucks.