With the setup like it is now I have arrived at a vision for the tank.
I'm envisioning a kind of archaic structure, with darker green foliage and plants as they grow in in the back.
I haven't decided on whether to stick to say, crypt retrospiralis or go more full bodied with stems in the back, but we'll see how it progresses so far.
The bolbitus gives it a distinct look with the stone. A friend commented on it looking like an island off the coast of thailand. While I stick to more "micro" inspiration and individual rock groupings rather than "macro" landscape inspiration, this does seem to be an adequate comparison so far.