Yeah, well..... On our opening, new liner, and first fill, we filled to a point just below the opening in the skimmer. All seemed pretty OK, until we got about 1.5 inches of rain, then the skimmer quit skimming and I was a little unsure what to do. I know the top of the skimmer is a slip fit and will leak if overfilled, so I knew I needed to back off. I drained about an inch or so of water to bring the level back to just under the top of the skimmer. So, I believe I'm now losing that nasty looking pollen slick on top of the water.
But, the definitive answer still eludes me. How full should a pool be?