I had a bunch of old sea shells given to me by my grandma and used them as mulch in a rock garden..Looked nice with some moss roses and it did not seem to do anything harmfull..Now, I wish I had not left them at my old house... Good Luck! Kathy Zone 5 _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]