Hey guys, this is probably a really stupid question, but I would rather be safe than sorry. I am going to have 50 lbs of live rock, but I recently went to the beach and picked up a bunch of cool coral formations and shells. After I boil them, will they work in the tank or do I need to do something else to them after boiling? I also had some shells from before that have been drying in a cabinet in my house for 6-7 years, do I need to boil these too or are they good enough? thanks!