I had to recently break my tank down and restart with the sand and water. I still have my live rock though. Im thinking about what I wanted to do with it once it was started up again, and thought of something I havent seen yet. I was planning on making a couple pillars with live rock and adding maybe 5 or 6 columbian sharks to school at the bottom. I could also add a large predator fish as well later on down the road. I was just wondering what your thoughts were on this. If anyone has a shark tank/catfish tank, pictures are appreciated for referral. Thanks