I read that putting copper in your bird bath can help prevent algae. Doug had a small piece of copper pipe, so we dropped it in, and it seemed to work pretty well. Until a raccoon or a crow or something stole it. So I went to the bank and asked them to dig up some pre-1982 pennies for me, and came back an hour later to see what they got. Hopefully, flat coins are a little harder to pick up than a round pipe.
