Peculative Proposal / Conceptual Design: 

Our original vision was to create a closed loop system with shrimp and algae. The shrimp would produce CO2 and the algae would consume the CO2 and create O2 for the shrimp. In theory the system should have been able to work for some prolonged amount of time. We imagined a very simple underwater garden.

Prototype:

We basically created somewhat of a smart fish tank environment. We wired a temperature and humidity sensor that collect data and help to monitor our environment from the outside. Inside our habitat, we secured a water heater and filter to the wall with a suction cup to help manage the water temperature and movement.