I wish I could find the post that inspired me. Some clever nerm had set up a beautiful 10g (I think) full of plants and moss for their desk, no heater, no filter, just a good light on a timer and a small school of white cloud minnows. And it was mwah, perfect.
I keep thinking about the challenges of a low-tech, but still low-maintenance tank and how fun it would be to set up, smaller or larger, community or display. How would you set up your ideal low-tech tank?