I had one for a couple of years and just left mine on the sand bed also. Every time I tried to place it higher in the tank on rock or whatever it would knock itself off and end up down there anyways. After a couple of tries I figured why fight it if that's where it wanted to be. Just make sure you don't have a fish that moving the sand while you're not looking and trying to get at the foot for a meal. I had a trigger doing that once to my clams and kill them that way.