Hi there. I just wanted to post a thing you can buy to help unclog the skimmer line. I didn't have to end up using this...I was able to clear mine by gently toggling the skimmer and main drain vavles, but though I'd share.
Amazon.com: Cobra Products 332 Drain Cleaning Water Bladder with Garden Hose Attachment, Medium: Home Improvement
Amazon.com: Cobra Products 332 Drain Cleaning Water Bladder with Garden Hose Attachment, Medium: Home Improvement