Ostrow, I am not arguing with you when I say this, I do belive what you are saying is true. However, I have checked the box, bottle, and papers inside the box. It says nothing about not using UV with it, and it is Chelated Copper Sulfate.
My UV is running on my reef right now and I am treating my fish in different tank, without UV. I think I must have gotten lucky in the past, and will not run the UV with copper because I dont want to take that risk. I will also let others know what you have said about it. Thanks for being here for me, RamJet (They need to put NO UV on the label.)