AGP. 27' round. Liner is 5 years old. This summer I thought it might be leaking. It passed the bucket test. Sometime between then and when I put the cover on, it developed a leak. Or I screwed up the bucket test, which is quite possible. We had an unusually wet late summer/fall with a lot of rain so that could have masked a slow leak. The return is plugged, the skimmer is also plugged. It is losing water and the area around the pool on the low side of the yard is constantly wet. I've been adding water to it. The water is much too cold for me to try to find the leak - it is getting below freezing here. at 5 years old, is that liner worth trying to patch? If so, what happens if I wait until spring and all the water drains out? I'm kind of looking for an excuse to remove the liner and put down foam board, which I should have done when I installed the pool. If it's not worth saving, it makes things easier, since I will take the cover off, let all the water leak out and deal with it in the spring.