I wanted to add a new fish to my 20gal so about 3 days ago while at the LFS I saw a yellow headed sleeper goby that I really liked, plus I needed something to keep the sand stirred up. So I got the goby and put him in the tank. Well he hid for the first couple of days, then on waking up on the 3rd day I knew he had been out and around because everthing in the tank is covered with sand! So now what? All he does all day is take up sand and spit it up everywhere! I knew he would do this, but didn't think that he would spread sand everywhere. I guess there really is nothing to do except take him back to the LFS or deal with it.