I don't run my aerator 24/7 , normally just the night hours. Don't know if that would affect the bubbling action with the excess protein. I have had alot of action in my pond this summer as it's my first full summer of aeration. I have had a few FA episodes this year, once nearly covering my pond. I tried to rake as much as possible but had to finish with a coat of Cutrine. Also bringing up LOTS of clumps of algae/leaves/weeds from the lower areas, even hard to rake them out they are so heavy. So I would assume I have lots or protein floating around to form whatever it decides to!! Hoping this is the worst and will get better the next few summers.