Hi everyone! I am starting my first reef tank (90 gallons with 35 gallon sump). I bought the tank used from a friend which is in great shape and he gave me his previously used dry rock with it. Is there anything I should do to the dry before aquascaping and putting it in my tank? Do I need to cure it? I've heard of putting it in a tub and putting boiling water over it. Should I do that? Help!