That is the most incorrect thing I think I’ve read in a while. I am also sure that Jeremy @ BAS would agree with me. I thank you should do some research. If you like I could email you some material to change your mind. I do want to clarify that I mean no harm. I’m stoned and I come in peace. I have zero sarcasm in this response. Nothing but love and the willingness to share what I know and learn off the others that can share theirs with me.only unhealthy plants will uptake lots of heavy metals.. happens outdoors as well..