Does anyone else have Nulk Reef Supply's TDS-3 TDS meter and if so, how does it work? Mine is always reading in the 100's! I just put all brand new filters and carbon in my ro/di system and it still reads in those high areas. I tested new water out of the filter and it'll go in the 100-110. That's basically the same as my tap water. I'm guessing either I'm not using it right (I'm sure I am) or maybe it's faulty or something. Anybody else have it and have the same problem?\n \nNow if I test the water in the five gallon jug that I just filled through my system it reads 007 which is good but I feel it should say 000 considering these are brand new filters. Should I expect the 000 reading or is 007 acceptable?