russn8r":1i0zh9fn said:Thanks David. That's because it retains the copper forever, no matter how many water changes?
I'm prepared to subject those rocks to copper and leave them in the quarantine tank for good, if they still provide filtration. If copper kills the filtration value, there would not be much payoff leaving them in.
Does the copper kill the live rock? If so would that turn the rock into a source of toxicity, rather than filtration?