Be aware of the toxic nature of copper salts to lower organisms (fish, pets, fungus,..).
I remember a reported incident of someone using a Brass fitting in their fish tank. When the tank got dirty (ammonia from excessive waste), the NH3 attacked the copper forming a small amount of a copper ammonium complex.
Then, ...everything died in the tank...everything!
You will also find, not surprisingly, copper salts in commercial fungicides.