Michelle there was a discussion at another site about this subject and a member there said he used polyfilters to successfully remove the copper.
Reefdream
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ok we did this very thing in a fully stocked reef tank. we bought some live rock and found out it had been run in a copper treated tank for years . I mean it had copper in it every single day for years and was maintained at levels to kill parasites for the enitre time. we tried the seachem for a while but didn't work near as well as poly filters. the poly will turn blue when it is absorbing copper and different colors if there is something else like ammonia or whatever else it absorbs. our tanks were fully stocked with shrimp fish acro,s , you name it. we did experience some lightening of acro's but no death. we started running the filters and it kept the copper levels low enough for everything to get back to normal health. I can go a year now without a poly filter and put one in for the heck of it and no trace of blue anymore. I am not a real believer that it will continue to release copper forever . at least not enough to hurt anything. all saltwater has copper including the ocean it is a naturally occuring substance. it is only etreme levels that hurt or kill. no way would I suggest getting a new tank because of 5 weeks of use.
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Copper Treated Tanks Question