Hi all. I woke up this morning to my pool making noise when the pumps kicked on. Went to check and saw bubbles coming out of my in floor pop ups. Checked the skimmer and it is draining faster than it can fill. It is a Venturi skimmer for A&A. Water level is good and no leaks at the pump or filter. If I close the valve that feeds the Venturi flow, the skimmer fills and looks to be working fine. The pool has been working fine all season. Nothing changed from yesterday to today. Any ideas what might be going on?