The only fish going into the tank as of now will be the 2 yellow headed jaw fish, and the harptail blenny to help with algae. I plan on having a deep sand bed, at around 4 to 6 inches, and a lot of small pieces of rock ruble for the jawfish to "build" with. I plan on having corals, and a diverse clean up crew. with jawfish and a dsp, do you need invertebrates that burrow and disturb the sand bed, or will it not be necessary with the jawfish, and more importantly, could burrowing invertebrates collapse the burrows made by a jawfish?