Is that anything to be concerned about? If it is, or perhaps even if not, is there a way to remove it? I don't want to use GFO as I currently have undetectable PO4 (although an ATI test came back with 0.05).
I'm guessing it could come from one of the pumps or a magnet in the ATO sensors. I also have a Vertex ground probe but that should be made of titanium and I'm guessing shouldn't be the source of any tungsten?
I'm guessing it could come from one of the pumps or a magnet in the ATO sensors. I also have a Vertex ground probe but that should be made of titanium and I'm guessing shouldn't be the source of any tungsten?