I have a 14' diameter hole in a large concrete slab with sand in it. Need ideas for cover for it when AG pool isn't up. Otherwise it turns into the worlds larges litter box. Cost is a factor but tarps just look junky and wind shifts them. Floating deck sounds nice but could use cost saving ideas. Even ideas for some type of lid. Not an area that is used other than when pool is up. Thanks in advance to anyone with ideas.