Hello all. I am a neophyte pool owner, and I am trying to figure out where my plumbing is going. I have followed the green to crystal clear thread to reclaim my pool, but I am seeing debris return when I vacuum and I have no idea where it is coming from. Can anyone tell me where these lines may come from? I have two pipes in my single skimmer, as well as a main drain, but I'm not sure what is going on as far as plumbing. Here is a pic of my suction side plumbing.