Just a footnote. Remember that copper sulfate are highly poisonous to molluscs, fishes and crustaceans, and could kill pets also, so if you have it, store the s

Just a footnote. Remember that copper sulfate are highly poisonous to molluscs, fishes and crustaceans, and could kill pets also, so if you have it, store the stuff and saturated solutions in a safe place and -don't- discard it in the sink.