I had a fighting conch just die a couple months ago after having him for a little over 5 years. It was one of my favorite animals in my tank. He was always roaming and stirring up the sand bed with his long trunk and beety eyes. I didn't have him in a deep sand bed, just normal amount to cover up the bottom plus some. He seemed to eat some of the thicker looking brown algae on the bottom of the glass and on frag plugs. No real cons for my guy other than the occasional cover up of a Zoa or paly frag that was small. But it was never horribly covered. He never bothered rock work and always seemed to like the hard to get to corners of the tank. Neat addition to the tank IMO