there is lots of stuff here that is interesting. I'm wondering if some of the rubble might be useful. There is a bunch of broken sand dollar rubble. I know it is dirty and potentially dangerous, but it looks like it would be great substrate. It's very pourous, and would really have a lot of surface area. I would think it could be sterilized. Lots of shells, and beautiful white sand. Just seems a shame not to take some of it home.