The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
Yup, i think it just makes oxygen exchange a little harder, but i could be wrong. Surface agitation gets rid of it. I just installed a powerhead on my 125 and its gone.
Yep, surface agitation will help with this and the surface skimmer sounds like a permanent fix (seen it at the LFS but have not tried it).
One quick fix you could try is taking a sheet of paper towel and place it one the surface and promptly remove it. The surface film should cling to the paper towel. Not a permanent fix but should help break the surface tension a bit.