Wonderful. But why didn't you just populate it with bass or something? Or fill it with Jello! Quite a lot of Jello? But worth it (and THEN still take it back to Costco)... VERY damned cool. Sand woulda been kewl too. Then you coulda gotten naked mole rats or gophers... Very kewl. Congrats on your brilliance. I live in a concrete slab house too...