I have just purchased 20lbs of Marcorock and 20 lbs of Caribsea Aragonite Special Grade sand. Both are dry. I plan to cycle with Dr. Tim's. Is there anything I need to do other than rinse the dust off of the rocks and sand before adding them to my tank? Should they sit in RO/DI or some other treatment before putting them in the tank? Do I need to worry about them leaching different elements into the water at all? Thanks!