Thanks to this site I've learned a lot and I'm ready to cancel our weekly chemical service. We need to save $ plus I now have the time to take care of it myself. He typically dumps a canister of chlorine (gas?) and some white powder in during his short visit. I plan to see him once more next week to say thanks and see if he has any tips for me.
Here's the first numbers from my new TF-100 kit.
A few days ago I deep cleaned the sand filter and couldn't believe what came out of there. I haven't bought any chemicals yet but it sounds like a trip to Walmart for bleach is a good start.