I like the idea of a large stump or rock. No rocks in the Rio Negro, but I can certainly put in a large stump. Great idea. Actually I have a large "log" that I located and cleaned and have yet to get the screws, etc. to be able to affix it to slate so that it would stay down. Perhaps when that is in, that would be better. Also, I think I really like the idea of a stump. There is an upcoming local swap meet and perhaps I can get something there.
As for style of aquascaping, this is a biotope, so it is supposed to represent the natural habitat. "Pretty" aquascaping does not matter and is not a consideration. (AGA Biotope contest rules). So I am not looking for pretty or like Amano Takashi. :-)
Biotope, natural, wildlife, habitat, as if you were there...standing amidst the knots and tangles of the flooded Rio Negro tributary with rummynose and cardinals swirling around the tops of your legs, as you are knee deep in fallen leaves and detritus. Imagine taking a net, placing it in the knee high leaves, pulling it up, and retrieving amidst the leaf litter a net full of dwarf apistogramma who dwell in those leaves.
Such is my tank.