I ordered an Intex 15 ft x 48 in Metal Frame Pool Set to replace my old inflatable ring pool. Last year I used sand and leveled the old pool. I have no level areas in my yard. This year I had planned and started to build a large sand box for lack of a better term. It will be square consisting of 3 walls. The side without the wall will be the highest point of ground and the side walls will be triangular following the contour of the ground. The 3rd wall will simply be a rectangle. I was going to put in a weed barrier just to be safe and fill with sand. The tops of the walls would be the top of the sand and level. I was going to place some sort of patio stones where the metal frame touched the ground to disperse the weight. They would be level with the sand. Then cover that with the ground cloth and install the pool. The walls of the box are going to be held in with 4 by 4 posts that will be buried about a foot each. All treated lumber that will be sealed or painted. There is about a foot difference over a 16 feet span(which is the reason for building the box. I was looking over the instructions they mention placing the pool on an absolutely flat surface. Which is the reason I am building the box. And not to set it up on sand. I truly believe that what I am building is well beyond my needs and will work for pool but would like to hear some thoughts.