On Jan 4, 6:35 pm, Michael wrote:
Will carbon filtration used to remove medication also remove useful
nutrients for plants? (like iron, etc.)

In a recent issue of TFH Magazine, the great (?) Mr Amano confessed
that he uses carbon in his filters. Believing them to have no ill
effects on his precision fertilization, they quickly lose their
"carbon" qualities and become great additional landscape for bacteria
to thrive. I only use it when I have a specific purpose like clearing
the water - I see no difference in my plants either way.

MG