[Enyin]

wait gmat,
I've been poking around on the web and it appears that it would be a bad idea to have any sort of chlorine in contact with copper - it apparently blackens and pits the copper.

Non chlorine bleach on the other hand is mostly made up of sodium percarbonate - which appears to be much much safer to metals

Interestingly the biggest references to this that I found on the web were from brewery's - which makes sense, they use a lot of copper and need to prevent biological contaminent in their systems. I'll do some more research but from first glance the non chlorine bleach seems to be safe to use.

EDIT:
rofl, this is interesting -- dishwasher additives like Jet Dry seem to *contain* sodium percarbonate, which is the same ingredient in non chlorine bleach, they also contain some other things like fragrance, a wetting agent and some other stuff
sodium percarbonate is related to hydrogen peroxide - is an alkaline that is relatively safe to plastics and metals - it *can* increase electrolytic action if there are two dissimlar metals in your system, but if you have that you're already in trouble