I got the main part of the tank custom made because the thought of making a tank that size myself was a bit daunting but I did all the divisions. I just cut strips of glass and siliconed them into a rectangular frame. Then I bought some nylon mesh filter bags and cut them to size and glue them to the frame. It was time consuming and a bit fiddly but well worth it. Word of caution though...........the first time I divided the top tank I used flyscreen and it was a disaster......leaked something toxic into the water and almost killed my fish. Had to spend the next 48 hours painstakingly cutting it all out again when it had taken me so long to get it in. Had to soak the tank for 2 weeks to completely remove remaining toxins and then had to restart and bought the mesh filter bags to use this time. So yeah ALWAYS USE 100% fish safe materials as it will save a lot of heart ache in the long run.
belleangel33- would have 10 of them if I had the time, funds and space.........aquabid here I come...........in my dreams!!!!