I was recently given 2 pieces of coral that has been dead and out of water for probably 50 yrs. My uncle who was in the Canadian Navy 50 years ago, brought it back from Australia for my Grandmother. My cousin recently passed this to me as he knows how much I love my tank. Is there anyway I could use this in my aquascape? If so, what should I do to clean it and prepare it for my tank? Here are pics of both pieces.