[j-man the skater-man]

i got some more of the best kind of rock. the FREE kind.....but what i didnt know before i picked it up was that it has been sitting in a bucket of fresh water for a week or 2 and is covered in green slime. My question is how do i clean the slime off so that i can safely use it in my saltwater tank? Is a pressure washer a little much?? lol

thanks jason