I am using the aquador so my skimmer has been bone dry for a few days. Then it rained and there was some standing water in the bottom of the skimmer like where the bottom ring is. I was wondering can that freeze and crack something. Should I put like a bag on the skimmer? I have some tape on the hole In the lid but this must have seeped in through the grooves in the lid where the lid screws into place