The pool store chemist (grumble grumble) told us to add too much Alkalinity on our initial first test. Two weeks later on testing he said "I told you to add too much" yet offered no solution. That's when I learned I have to depend on my own consistent testing results and ordered my test kit. Its actually been quite interesting and a little fun to tweak the pool myself. We learned here how to lower the T/A using muriatic acid and aeration, and started with a purchased fountain. It just wasn't quite enough so last evening my husband hooked up the small hot tub sump pump with a hose aimed over the pool. Its doing the trick! We started out yesterday with a T/A of 200, and this morning's reading is 150. I've been keeping the automatic cover off and only running the fountain/sump when I'm awake to monitor it, and checking & treating that pH often.