Thanks, that makes sense because that side of the pool had to be built up with fill dirt after the plumbing was done. It wasn’t a lot of water just enough to make me worry. I am really trying not to lower the water below the returns because then the tanning ledge is completely exposed due to the deep end returns being lower than the shallow. This also makes it more difficult to pour in antifreeze. I was thinking of making a few snorkel like devices with threaded ends and just pouring in there and leaving them for the winter. Does anyone do this?