I can tell you first hand that copper will wipe your system dead. It will kill your inverts as stated above, your rock, and eventually your fish. (even though a copper dip is used to eliminated some fish disease). luckily for me it stoped at the fish, but I lost almost everything else. Get some cuprisorb if you think you might have some and get it in your sump.
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"what do you mean you need another tank??"
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