So, a buddy was having some issues with his tank, he brought me some water and we tested everything, everything looks ok.. Then he said I brought some RO water that I buy from a "store" in homewood because I don't have my own RO set up yet, can we test the TDS on your meter.. Sure I said.. So we test it and it's was 115 ppm.. I said well bud, I think we have found your problem.. My city water test 54 ppm on the inlet side and 0 coming out of course. Just wanted to share some knowledge for the people that want to know.. He just got the water yesterday.. Very sad...