I don't have an answer on this one yet. You never should have used that product in your pool. That is for sewer URL1 may dissipate over time or at least be diluted some with rain and refill water k sorry to have to say this, but I think the best way to get rid of it is to dump it and refill, or do a partial dump and refill.
There are applications for copper sulfate, but there are better alternatives. So I would have to agree with the above comment, 'dont use it in the first place(or something to that effect) I am not sure, at the same time, if rain water will dilute it, but that does sound like a more cost effective option, if it does dilute it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.