Hi All, Sorry if this has been discussed before. I only saw a bit mentioned in the salt mix of copper. I picked up a bottle of All For Reef today and noticed as one of the ingredients it lists copper. Is this OK to dose with copper sensitive inhabitants? I was planning on using this in my Biocube but I have urchins, seastars that would be sensitive. Other tank houses an Octopus which I would not use on that tank obviously. What benefit would the corals have with copper over the sensitivity of inhabitants?