I switched to a mesh cover last year on my in ground pool. When I closed the pool I used four tractor tubes spread evenly under the cover...six or eight would have been better. The tubes were great until the snows began in December and never melted until March. The snow and ice got thicker and heavier, pulling the cover closer to the edge. The tubes held up ok. Any ideas as to how to remove the snow before it builds up? Or has anyone tried stacking the tubes by 2 or 3 to build a pyramid type structure? Thanks for any suggestions.