Posts Raised on my Above Ground Pool
Three posts on our above ground pool moved due to frost, and the liner has pulled away from the pool, and the top ring is about 4 to 5 inches above where it should be. How do I fix?
It sounds to me like your pool needs to be drained and re-leveled. It's best to leave a little water in the pool, just enough to hold the liner in place and keep it from shrinking.
When the pool is near empty you would remove several of the top rails in the area that needs to be lowered. A person inside the pool would then pull the liner back away from the edge of the pool. Working from outside the pool, you could raise the bottom rails, just enough to get a spade in there to remove some of the dirt and sand. When the rails have been lowered you might need to repair the cove on the inside of the pool. With this done the liner can be reset and the rails reinstalled.
I talk more about leveling a pool in this way here.
Pool Out of Level