The algae home dome floats on the water. It is very simple:
1. Translucent bioplastic dome (they exist - see link)
2. Over the dome a series of organically shaped tubes are draped in which living algae circulated
3. The algae tubes radiate outwards from the dome so as to form a platform
4.
The algae continuously circulate to make sure all of them get their bit of solar power
5. You grow the algal biomass to create liquid biofuels (biodiesel or ethanol, depending on the species - this exists)
6. The small processing facility for the biodiesel is located beneath the dome; there you also find the fuel tank
7. Since the algae dome home is located off-shore, you use boats as cars to get to and from your home - the boats of course work on biofuel
8. All other power for the house comes from a small biodiesel/ethanol generator
That's it. As always I made an incredibly fantastic picture of it!! (see link, where it says: incredible fantastic picture!!!)