Several years ago, a company made a large plastic piece that could be glued to the back of the tank and it converted it into a half tank/half dry land tank that had several waterfalls running through it. Kind of like the Tetra's viquarium but this one had a powerhead pump water to the top and water would flow down several levels, down miniwaterfalls. These were offered at a few stores and were quite expensive, if i remember correctly. does anybody remember what they were called or know where i can buy one? ??? thanks.