Craig Warren Kalamazoo County Michigan 5 out of 507.09.2020 at 12:22 pmWe have been using these for 30+ years and find them to be very useful. Lately we have been filling them with rubber mulch which tends to make them cleaner, more three d , and about the wt of a real body, wt. wise in the water. Only concern is that the largest is only about 5ft 5 or so. Other than small, they are great. we currently have five of these.