good for him, bad for me. I had a 3" banjo catfish I put in my 36 gallon bowfront tank with lots of barbs and such but it had a rock substrate so he would wedge himself inbetween a couple fake wood decorations during the day but I could see him which was pleasing because I knew he was healthy. I had set up a small dish with sand but he never seemed interested. I recently finished setting up a 65 gallon tank with mostly sand substrate and plants and after a week or so I decided to move the banjo to the 65 thinking he'd like the sand. I was right, he immediately darted to the sand and wiggled his way underneath. He seems to love the sand although I never see him anymore. I can only find a lump or dark line from his tail in the sand. I guess he's happy though. A warning though, their fins are SHARP! I couldn't get to him to net him so I was going to coax him out of his hiding place with my hand so I reached in and lightly nudged him with my finger but he didn't budge so I nudged some more and ended up just pushing him across the floor when all of a sudden he curled up around my finger stabbing my finger with his front fins (don't know the name for them). they're basically rosethorns. I thought he would release but I finally gave up and pulled him out of the water with my hand and finally got him to release halfway across the room. beware, they are painful, hehe. Kyle