I have the aquador and a threaded plug for my return. I'm thinking of just leaving my water level where it is when I close. Will those items protect my skimmer and return? It should be noted I will be using a micromesh cover so I may periodically have to drop in the sump pump and drain a little if the water gets too high. Can the freezing water somehow break the skimmer or return even with the aquador or return plug. I mean they aren't "flush" against the liner. Can they somehow get pulled up as the water freezes.