Did you buy this system from IONICS directly or second hand ?.
Cause if I had bought directly from them id be straight back to
them so that they could demonstrate this to me personally.
It could be that your system isnt setup corectly, they would surely be
able to sort this out for you. If not them I would kick up hell, their
systems are expensive and must do what they claim and I wouldnt
leave their premises until they got it working right.
If you dont have the time to visit them, ask for the telephone number
of a company using this system and ask them if they are having the same
problems and how they got round this.
Terry