hi i have just purchased a water fed pole system which was second hand, using a merlin reverse osmosis system and a di unit, i get a tds reading of nil, (12 after ro unit but nil after di unit) however when using the pole it still leaves water marks after drying, i am new to this and stuck instantly which is a pain as spent quite a bit of money....hope im not doing anything stupid....i have checked the tds meter with normal water just to check it worked :-)....my system is set up as follows............... tap - merlin ro unit - 500ltr tank - Di unit - pump - hose - pole -............HELP!!!!!!!!!!!!!!!!!!!!!!!
Many thanks
James (newbie)