I am 99.9% sure I have a crack somewhere in one of my skimmer lines (2 skimmers tie together somewhere before the pump) as when I switch from 100% main drain to skimmers I get a surge of air that doesn't clear. If I leave it at a 50/50 split main to skimmers the air stays but it never runs dry. If I switch full skimmers and plug either basket the pump runs dry within 30 seconds. My goal it to find the crack and repair. I've been told that I could use this hose bladder: http://www.lowes.com/pd_24344-319-00...=#BVRRWidgetID by sealing off the pump and plugging this into the skimmer line thereby tracing the leak back. Any better suggestions? I've got about 2 weeks before the wife expects the pool to be open and crystal clear. Thank you.