Seachem CupriSorb is a powerful adsorbent of copper and heavy metals. Seachem CupriSorb will remove copper more rapidly and efficiently than carbon, and is thus ideal for emergency copper removal. It extracts all types of copper, including chelated copper, and remains effective until it turns a deep blue-black color. It may be regenerated repeatedly. If placed in continuous use, it will gradually extract even precipitated copper from the gravel/substrate bed as well. Seachem CupriSorb will allow maintenance of invertebrates in copper-treated tanks by removing copper leaching from substrates. Exhaustion is indicated by a pronounced discoloration of the beads to a deep blue-black color. When exhausted, Seachem CupriSorb may be discarded or regenerated.