It's a new-to-me unit. Basically the shell and then the innards are all I completely new (membrane, prefilters and some of the fittings).
The one before, as far as I know, it worked fine at the old house. Course I didn't always have a TDS meter though, so my perceptions may be off a bit.
Nothing was changed in the old unit in the move; and it seems to me it was after a year that I really started noticing things going aksew.
Bob, I remember when you told me that only fools use halides over their tanks, and that you would never ever use those.
Thanks for the helpful post though
At least you get one more post count now.