I know this topic has been discussed before, but I have some questions that have not been answered yet. our pool was installed in early september of last year. We had some weather issues that set us back considerably on the build. after the dig, we had rain. The clay soil did not dry up it only held water in even as the PB was trying to pump it out. Stone was brought in to offset the soft soil and the portland mix was put in. That looked great before the liner went in. the liner seemed to go smoothly and looked great. As we waited for the backfill to settle so we could poor concrete, it rained again and again (maybe one more time in there also). This did concern me as I was worried that all the rain would get water behind the liner as only the coping was visible. While waiting, I turned on the light one night and saw a few small craters in the pool. I didn't think anything of it as it was only a couple. At the end of the season and after the concrete finally went in, my kids jumped in once and then we closed it up. The opening went smooth and the kids started swimming. I turned the light on again and saw more craters. we had some people in the pool recently and after I saw the picture below. I had the PB over to look at it during the day and had emailed him some night time pictures. he explained that some pool builders put liner pads down to keep appearences up. is this true? Is this a common problem? I used a non local PB, looked at some other work in the area and talked to owners. All had good things to say. Will these dents work themselves out or will they only get worse? please help[attachment=0:1u998sxu]pool dents.JPG[/attachment:1u998sxu]