My water had been in the tub for 4 months and was what I call "stale". It had the fizzing and other negative characteristics that say it's time to change.
With the Shop Vac and battery pump I bought from Spa Depot, water changes are done in a couple hours, so I guess I was just lazy.
After filling, I wanted to get the alk right then worry about the other levels. I was absent minded and poured too much baking soda in and the alk and ph went off the charts. I poured nearly a quart of ph/alk down in and shocked and boosted the bromine.
The end result was today all levels were perfect following a computer analysis. I will do the alk up in a slower fashion in the future.