Thanks. That's kinda what I thought was going on. Only thing is, I had to go up to 25ppm (dilution test method) to achieve that change. still has that odor at 20, but trying to hold somewhere between.

Is there any reason why my CYA would rise WITHOUT using anything but bleach and MA? I would have thought that having to add a total so far of 5" of make-up water would have lowered it a bit. But mine seems to have gone from 70 to 100. Not that this is a bad thing overall, just means that I have to keep a minimum of 10ppm chl (best guess chart).