Is there any knowledge or experience on an above ground pool? I'm new too pool ownership but have done a fair amount of research. I'm attempting to vacuum the bottom of my pool with a Shark vacuum. I have the pool full of water, pump runs well, filter has new sand...My problem is when I plug my vacuum into the skimmer it will operate for about 2 minutes then lose suction. The pump seems to airlock. I don't see any leaks in the plumbing where it could be sucking air. Any suggestion?