I have a 20 year old pool, still in good condition. I noticed that the one upright post is off one quarter of an inch off ( I took a level and measured the top of the post and the bottom at ground level). I'm concerned if it is still safe to swim in this pool another season, of should just put in a new one. I thought I could keep this pool one more year and install a new one next year. Safety for my grandchildren is first.