While participating in productive procrastination from homework, an idea crawled into my head. Has anyone considered, or successfully operated a reef aquarium outside (backyard) in Southern California? I have experienced it before at the Waikiki aquarium where the have a clam propagation tank outside. The only problem I can find is the temperature fluctuations in California are greater than the weather in Hawaii. A bad*** chiller and heater would be required for the tank. Other than possible falling debris, any other concerns? Most likely no fish, just coral so local racoons or cats are not tempted to go fishing.