According to everything I have been reading, yes, the rock would absorb some of the copper. However, over time, this continues to leach out, and get filtered out. I am not saying that it is not possible to have some copper still in the rocks, highly unlikely after a year of no more introduction, don't know, I am not a scientist. I would like to add that if you are showing good signs of growth such as inverts (
pods, hydroids, feather duster, serpulid worms) and Coraline growth, be aware that these things are very susceptable to copper and die off. If you have abundance of these things on the rock, chances are, you are ok...ultimately it is your decision and
FWIW, I
HTH