I just got a mushroom yesterday and he was not attached to any rock (which is not a problem to me I guess). But as I put him in the tank, the current moved him all over the place. I did happen to have a small rock for him to try to attach himself and I placed it a shot glass but the mushroom doesn't seem to stay on the rock. Could someone give me some tips on how to help him attach better to the rock because he keeps falling off of the rock. Thanks.