If the copper measured higher than 1 ppm ... all equipment, all live rock, all sediment and the glass tank itself -- is no longer safe for use as a reef aquarium. Some people will disagree with that assessment and say that all you have to do is run carbon and polyfilters but that won't remove all of the copper. What you may end up with is a tank that seems safe but that suffers all sorts of problems maintaining livestock long-term. This is what I have concluded from reading several threads on this exact same problem and having the hobbyist come back months later and say that it's just not working, his snails never live more than a week or two, etc.
<u> Dr. Ron Shimek</u>, who has decades of experience working in a marine lab in Washington state, says that live rock and sediment cannot be used again in a reef tank once exposed to copper and than a glass aquarium cannot be used unless it is subjected to an extremely tedious and dangerous decontamination process. The process is so ridiculous that it's not worth the effort, in my opinion. I have it somewhere on the board because it comes up so often and I guess I could post the link in here in case you want to see what it entails.
http://www.reefland.com/forum/reef-aquariums/17815-crash-then-some-2.html">http://www.reefland.com/forum/reef-aquariums/17815-crash-then-some-2.html</a>
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