I closed my pool the other day with my old winter cover awaiting the arrival of my safety cover (sniff, sniff) . My questions are
1-After blowing the lines out and plugging with expandable plugs, should I refill the water to normal levels or leave an inch or so below the returns? There appears to be some pros and cons to both but what is suggested? I.e. drianing the antifreeze vs. allowing to mix with the water, supporting the cover vs. not supporting the cover, ice catching the plugs vs. not catching the plugs, etc.
2- If leaving the water below the plugs, how far should it be below the plugs and why? I read on the sticky 4 inches. Is this because frozen water will expand that much? Obviously dependent on how cold it can get.