hey guys, i'll be going to the beach pretty soon, and was wondering if i could get the beach sand to use it in my tank? and also shells and probably some rocks. From some research i've done, people say you should boil the sand to sterilize it, if so, how long? As long as i boil the sand would it be 100% clean and safe for my tank?, even if the sand is not as clean? Is it safe for me to put rocks i find at the beach in my tank? any suggestions?