I am seeking different ways to rid my JBJ12 of its surface scum. It has the upper overflow skimmer and a power head circulating the surface water but to no avail the film remains. I had heard word of using a paper towel to "Surface Skim" but have concerns that it would release dyes or fibers to the aquarium. Also i am wondering what produces the film in the first place because it has not always been a problem. Thanks- Andrew