A friend of mine has given me some dead coral peices that she had for some time. They are really nice peices for decoration only. What I would need to know is what do I need to do to clean and sterilize them for a FOWLR tank. They are already bleached out, pure white. Do I need to soak them in a bleach bath for a couple of hours or what? I don't want to introduce any Bad pathogens or any thing that will kill the fish that I plan to stock. Need advise, please. Thanks, Michael