Was at the Virginia Living Museum in Newport News, VA and took these photos of an artificial oyster reef tank they have. It is 250 gallons. Although there are none of the little fish that you are currently enjoying--Skillet, Goby, Blenny--they have some larger species in there that seek refuge around the reefs as juveniles. They do have another exhibit called, "Piling" that has all those mentioned above, plus more. I should have gotten you some pictures of it as well. The VLM does some conservation work in the Chesapeake Bay with transplanting S.A.V.'s and oyster work. The first picture is a 'before' and the second picture is what a growing or established reef would look like after a few years. Both pictures come from the same tank. Note: no living oysters in the system.