I will give my same answer as on Reefbuilders...
I keep assorted snails and I think I have a hermit running around in one as well, I also happen to have a clownfish in mine, (more of a prison sentence) was mean to some fish. I also keep Peppermint shrimp in mine to help control the Glass Anenomes, I do need to either keep more snails or better ones for cleaning the detrius. I left my bare bottom with moveable shelves so it is easy to vacumn, granted it's been running for 6+ months and I haven't done it yet, every now and then I just take a turkey baster and blast the bottom to suspend the junk and let it filter down to the sump. I am not sure if this system is tied to a display or not but mine is.
Oh and here was my first answer just looking at the title...FRAGS