I drained a good amount of water today and am refilling. I'd guess maybe 1/3 of the water...maybe 1/2. It's currently refilling and I'd test levels hopefully later tonight or tomorrow.

I think what I did wrong was to not check ALK like I should. I'll make sure to start keeping an eye on this. My reason for being dumb on these issues is my wife took over ownership of the pool last year due to my being overseas. So much of my pool smarts disappeared. I've been here and to those sites you've mentioned more times than probably anyone. Though I'm a Pool Forum n00b, this forum stuff is old hat for me....I have over 23,000 posts on the other forum I belong to.

Anyways, we'll see what the new testing brings.