We just got an intex one, and figured the ground cover/ tarps would be suffiecient for keeping it safe. However, we're currently living in the desert, and the house we're renting has a dirt back yard. We paid to have it raked and all the "plants" removed, and it was perfectly smooth. I guess there's rocks underneath the dirt that are coming up from the weight or something and we're stepping on them in the pool, and these little spikey things too. I have no idea what they're called. My first thought was to try to get some of those industrial rubber mats with the grids, that are about a 1/2 inch thick, and place it under the tarps to kind of get it off the ground some, but I can't really find them anywhere, and the rubber "drainage mats" (closest thing I could find) come in small rolls and are pretty darn expensive. I'm not wanting to put a ton of money into it since we're only here for a few more months.... but UGH. It's getting annoying. Suggestions?? Ideas?