I am about to be setting up my Intex style pool and had to dig about 6-8 inches on one side to get the ground level. I made my circle about a foot wider than the pool all the way around and wondered what I should do about the gap left on the side I had to dig out. I don't want it to fill with water or wash away the sand under pool. Should I backfill with sand or with dirt or with anything at all? I have gained a bunch of useful information here and thank everybody for the help.