I have a bare bottom 6 gal qt 2 small sponge filters and a hang on the back filter the hang on the back has about 50 little balls of ehime substrate pro biological media in it. Eheim says it's non absorbant it also has prefilter filter floss. I have added a total of 8.5 ml of copper in 1ml incriments over several days. I am only at 1ppm reading of copper in water. I'm using salient copper profi test to test copper level. my lfs said this is what they use in there store. I was under the impression that I should of been at the 2.0 ppm mark for the therapeutic treatment purposes. But iam not please advise what I need to do please and thank you.