I have a 24' round 15,000 gallon above ground pool that is 12 years old and has the original liner in it. Earlier this year I patched a hole in it and the patch is holding up well, but now I have at least two more new holes in it. I'm getting ready to cover the pool for the winter, but next spring should I even bother with trying to find the holes or with the age of the liner should I just go ahead and replace it? Also some of the sand cove has washed out and I'm curious to how hard of a job it would be to replace the liner myself and fix the cove. Is it worth it to have someone else do it? I also am not 100% certain on what type of liner I have, its either beaded or j-hook. I took some pictures to see if anyone could help. Thanks.