I found that the skimmer had been skimming too wet. Turns out it was in too deep of water as the water is running
Not sure which skimmer that is but doesn't the output need to be above water? Mine was doing the same but I raised it too high, then I lowered it to just touching the water, now I can run it with the valve open further and get some dry skim.
A good friend that I don't get to see nearly as often as I should (since he moved to Timbuktu) read on another thread that I am looking for one and posted that it was mine if I came and picked it up. It's a 7-hour drive round trip, but it will be good to see him as its been a while.
Nice, will be a good day.