Rotation of Crops

I'm on the cusp of my last semester at College, and my new job at the Farm Institute seems right on the horizon. I just heard that a greenhouse addition to the main office ala Earth Ship is in the works. We could grow food all year long and heat the house (via passive solar) in the winter. I'm most excited about the prospect of a future farm tech showcase with different hydroponic setups, including a window farm and an aquaculture system. I have an idea that we could make a aquaculture system that raises very small fish that feed on algae — hopefully some that we can fry and eat.

Inside the main hallway/greenhouse of an earthship
[http://new.earthship.org/buildings/global]