they don't put inverts in their copper treated system. if in fact they do use copper on a regular basis, i would not think that they are very health conscious, but more sales conscious. the reason i say this is that i believe a steady copper treatment to be similar to a steady chemotherapy treatment to humans, just in case you get cancer...
i would not stop going to the store if their prices and selection were good though...after all, aren't all stores in this to make money?
...it won't come into your home system, but please don't continue the chemo treatments!