Quick question...I have had the champagne bubbles for a while and now my pump strainer basket is almost empty and there is an air bubble in my cartridge filter in the morning. I have been quick to blame the solar system because when I isolate the solar out of the system using ball valves, this doesn't seem to happen. Can solar cause such bubbles too through a malfunctioning vacuum breaker or are the bubbles always caused by a suction-side leak. If so, I only have a Jandy 3-way before the pump and that might have to be serviced.