Originally Posted by tonedogz
Sniperhawk is right about the cupramine. I've emailed the techs at seachem and they told me using their matrix carbon and there cuprisorb you shoud be able to remove the copper from tanks
it is also dependent upon what materials are in the tank as I imagine some will bind up the copper more than others, so any claims of completely removing copper should be taken with a grain of salt. I'm sure it will remove it from the water to undetectable levels, but it is what is bound by materials in the tank that is cause for concern.
One thing that can happen is if a rock has bound copper and a sessile invert is introduced, it will not be able to attach to the affected rocks and eventually they whither and die.
What were you using copper for?
If it was ich or oodinium (marine velvet) than you should opt for hypo-salinity treatment in the display tank.
if it was flukes or other parasites, than they should be quarantined.
now that you have used copper, you are kinda limited to strictly fish now.