Ferdinand learns a new trick
 

At first I was like: "Neat! natural behaviour!". Then three days passed and he kept doing it. Every 2 minutes. It takes 3-5 minutes for my water to clear after the sand is disturbed. My tank has looked like a snowstorm since Friday. You'd think I never feed this guy.
http://i1100.photobucket.com/albums/...ps0d082e20.jpg

Now my sand bed is more cratered than the moon. On the upside, he's almost as good as vacuuming the sand.
http://i1100.photobucket.com/albums/...psce5f7079.jpg