So earlier today a bought a feather duster. His little "duster" came out of the tube earlier when i first put him in the tank. I had to put my hand in the tank to move something and i scared him and he went back in his tube. I went to work for a couple of hours and i came back and his "duster" is not out. Maybe another fish scared him and he just went in? idk. Also i was wondering if i can burry the rest of his tube in the sand, well except the part that the "duster" comes out?