Probably because of the damn 3" tabs we are using is my guess as they all seem to have stabilizer in them. I'd like to find tabs that are JUST bleach and that's it. Heck, I've even thought about using the Clorox tabs you drop in your toilet tank but they are expensive per use.

100 is a little high, but nothing too drastic but I will be taking some water out of the pool. Test kit I'm using is the big honking one they sell here and I've been replacing the chems in it when they get low. I think I have the 232 model off the top of my head. Off to the pool now...