Thanks, everyone, I've been off my computer for the last week or so. I will skip the Aquafinesse. (I found the ingredients listed when I searched for the MDS sheet). I'm so made about the UV sanitizer--it never even occurred to me that it's also breaking down my chlorine!! DUH!! I feel like I was taken for a ride because even though it was "part of the package" I know I paid for it somehow!!!! Sigh. I can always unplug it:-(