I have a skimmer/main drain diverter that, when I moved in, hung out in the skimmer. What is the purpose of this? Should the "door" on the bottom of it be opened or closed if used in skimmer.
I also have what appears to be a "floating weir" that sits in my skimmer basket, rather than a door like you have listed in Pool School. What exactly is the point of this? Does it need to be there? It doesn't exactly keep the junk from floating back out of the skimmer as far as I can tell.
Thanks for answering my questions.