You can use that as well, as I mentioned before, just make sure you get a good copper test kit. After the removal of most of the copper you will be cycling the SW, so by the time you are ready to put in corals and inverts there should be no cooper present (assuming water changes as well). With adding fish (if you put them in first) even if there is still a bit of copper present they should be fine.
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RSM 250. Clownfish, Fox face, Blue tang, Yellow tang, Kole tang, Clown tang, Coral beauty angel, French Angel, splendid dottyback. CUC, softies, lps, sps.
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