You can get rid of it If you carefully skim this off first when doing your water change,but it will soon be back..A skimmer is really the only way to rid your tank of it.That or lessen the bioload in the tank.This film is mostly from dissolved organic waste(fish pee and poop) so loose the fish and the film should go away for good...
But I'm sure that is not what you have in mind,,,So a GOOD and POWERFULL skimmer is a must...