I have a customer that has that blue dye in the pond/waterfall. They were asking me if I knew a way to make the water clear again. I sure as hell don't know, since I don't due that kind of work. But after I left I was still kind of curious myself. Does any one have an answer for this? Oh yea, she also said that she prefered that it not be pumped out, since it would have to be drained on her lawn, and she was afraid that it would turn her lawn blue.