We just opened our 18 x 38 pool & see that the liner (installed approx. 10 years ago) in pulling out & down at the corner in the deep end. It appears that it just pulled down from uner the coping. Can anyone tell me how we can fix this without emptying our 45,000 gallons of water from the pool? Will it stretch to go back up & under the coping? Thanks for any advice you can provide!