jdieck...thanks for the response. That makes sense.
Do you, or anyone else, have any ideas about how to make it stay until it attaches? I have looked everywhere for a spot to wedge him without restricting growth too much but it has hopped off or been pushed off every time. The toothpick idea would work but I cant remove any rock from the tank to drill it.
Thanks for any suggestions. He is still on the sandbed but I want to move him ASAP.