my beaded liner has been up 3 years and the sand cove under it has gotten uneven. it is an above ground 21' diameter pool.if i left the liner up around the skimmer and filter area. would i be able to take the liner off the rest of the way around and straighten the sand and put the liner back up without the liner tearing. any idea how old the liner would have to be to be too brittle to remove and reuse. thanks for any info.