10-25-2011, 03:05 PM
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The surface film is a protein scum. It is caused by organics, and can occur from time to time. I see it minimally in a couple of my tanks, never in others. Regular partial water changes of 50% weekly, good filtration, not overfeeding, and not overloading the fish load all work to keep it minimal or non-existent. When you do the water change, invert the siphon and remove it; this will at least keep it less. Water movement at the surface also helps to keep it from forming, the filter flow directed across the surface, or with a surface skimmer attachment to the filter, depending upon the type, will all help too.
As for the cloudiness, that is likely a bacterial bloom. Same "treatments" as those mentioned above. Plus good vacuuming of the substrate during water changes (not around plants though).