Thats what I am actually planning on doing! Sticking some PVC pond liner to the wall at the back of the tank running back into the aquarium to protect the wall and prevent any water dripping onto the floor (It will run back into the tank instead.) Then I am going to attatch 2-3 of These: http://www.ikea.com/gb/en/catalog/products/20120577 to the back behind the aquarium filled with emmersed plants I want to try my hand at a few emmersed crypts but I will probably go for larger swords and mosses to help hide the boxes. Im also in the process of raising the shelves and attatching T5 tubes to the underside with DIY gutter reflectors to help the plants grow a little better and also illuminate the aquarium a bit better (The LEDs arent up to the job on their own but great for spotlighting specific areas and getting the "shimmer effect!")