The skimmer farthest from the pool equipment wasn't suctioning. American leak detection came out to see if the pipe was clogged with debris. They found a clear membrane had formed sealing the pipe and capturing leaves behind it. They had a camera on the end of a scope and showed me where they poked holes in the membrane using the scope so they could blow out the leaves. Since they didn't have a firm enough tool to remove the membrane completely it will probably clog again with leaves. Dave the owner said he would check his equipmnet supplies to see if he could come up with a tool and if not would try to recommend a company that could help. He said he had never seen a PVC pipe sealed off like that. I was thinking of calling a plummer. Has anyone had this problem before and/or have recommendations for removing the rest of the membrane? I'm really baffled at the cause of the clog. Any help you can provide is much appreciated.