Yes, you heard me right. After the pole attachment for my vacuum head broke, I decided to get into the pool today to do the job my hand. I discovered that I've got a buildup of gunk down around the bottom where the seam is. It looks like a flap of ... vinyl or whatever is catching all of this stuff. I'm about to whip out my utility knife and trim this off! Why would Intex, if this flap is necessary in the manufacturing process, not turn it down so that it doesn't catch all that stuff?