Hi all! Finally I've got Lamotte NO3 and PO4 kits and Seachem's Iron kit. But, NO3 kit saids my tab water is 16ppm NO3.(3.7Nitrate-N) I mean I can't remove Nitrate from my aquarium by waterchange. What am I suppose to do? Is this tap water O.K for waterplanting? ============================ Hong, Sungmin (S.Korea) ============================