Not sure where to post this question, however. My vinyl liner in my inground pool has quite a bit of air space or maybe water behind it mostly around curve where steel wall meets the sloping part of the concrete bottom. There also seems to be a few other areas where the liner is not tight ot the bottom of the pool. Not sure why this is??? Is this normal or do we need to hook up a suction unit behind liner??? Is water getting behind liner?? Not sure if it was like this to begin with or could be getting worse I'm thinking?? Help Please. New pool and liner last fall.