I know it's not much use without the link, but I can't remeber it. Anyway I saw a page where a guy had a huge tank installed in his wall, and basically from the front it looked like it was just a part of the wall, but behind it there was a separate room where all the filters and equipment was. It had a drain in the room to pour water down and looked AWESOME!!! it was about 8ft by 3ft by 3ft I think, and he obviously spent a LOT of money on it, but it was truly stunning!!!