Based on my latest ICP tests, I have one grow out tank with slightly elevated levels of metals (e.g., aluminum, etc.). I probably can remedy the situation with a major water change, but I am curious what the R2R community has used for removing metals. I know that Cuprisorb, Metasorb, and other treatment options are available. What have you used successfully to remove metals and how did you do it (e.g., mesh bag, placement)? Would it make sense to use a reactor?