Had liner replaced this year and noticed i was loosing about 1/2 of water a day. pool company came out and checked everything out and could not find a leak. had me block both skimmers off and the leaking stopped per the bucket test. determined with the shallow end plugged the leaking stopped. When it was leaking i had no air in my skimmer but with the shallow end skimmer plugged i had air. about 10 days later i noticed i was loosing water again and the air is gone again from the system. So now i am at a loss to what is going on. I would think that a skimmer line leak would have air in the line and loose vacuum? Any other ideas would be greatly appreciated.