A very good question, Ed. This is all new to me, so I am uncertain as to the outcome. I imagine alot of that will be dictated by how much rain or melted snow is added before an appreciable thaw. Ironically, I did already consider the potential of ice movement as I sweated out the water level vs. the height of my 6' tall drain filter case unit. Fortunately, it is about 2+ feet below the water level right now. I guess the "structure and ice" thing did come to me a few times, but brushed it off as unavoidable until the water level rises above them. I sure as heck would not want to try and place it after full pool. As an aside, I did note that the mass of ice that had formed in the pics above was wide open around and within the tire pyramids. I gotta think that maybe the black color was absorbing some of the solar gain?
