My TDS reading after going through the ro systum and 2 di vessels is reading 12, what do i need to changed or refil, IVE BEEN USING MY SYSTUM SINCE JANUARY 07,any help greatly welcome, im very good at using my reach and wash systum but not clued up on the tech side, im in southampton, so if anyone would be prepared to show me how it all works or just some advice, GREAT
JAY