More surface agitation as has been mentioned will probably fix this. Also another cause that I have heard about is spraying aerosal cans of some sort in the same room to cause this film...probably not but just another cause.
Good thought about the aerosols, but we only use those in the bathroom, and even then i doubt they are contributing, but thanks for the thought. I could see how that could contribute in some cases.
We'll see what happens. More filtration, redirected water flow, and the skimmer should definitely make this a non-issue moving forward.
The film is due too excess proteins/organics in the water. This is a common problem in planted tanks, which have better water quality than a fish-only tank. So it's definitely not a filter problem.