I have decided to replace my liner in the spring. The current liner had to be patched in several spots when I tried to close it. I drained it completely to put the patches on. My questions are:

How much water do I need to refill so that the liner will stay in place and protect the base material for the winter?

If I am not concerned with water quality due to the fact that it will all be emptied in the spring, is there any need to cover the pool for the winter?

Thanks