I am getting ready to start building my first bog, and I need some advice. I have a pretty good shake on the layers of media and media composition but my main worry is that since I live in a rental house I can't really dig a large hole and place a small pool into the ground. My original plan was to put the small pool on top of a piece of plywood supported by cinder blocks, located in a sunny spot and leave all year without any fuss, but I was reading something somewhere that said I should bury the bog to prevent it from freezing. Is this necessary in my climate zone? I live in Savannah, GA and right on the coast, I have Moon River in my backyard.
I want to make sure I make the right moves before investing in this project and any advice or personal growing experience in my region would be so very helpful.