A protein skimmer will definitly help with the film on the surface of the water, but so will the surface skimmer, as long as the surface skimmer is hooked up to somthing with carbon, floss, or some other type of physical filtration.

I am with Andy though- I am pro- skimmer.

When i get any type of surface film at all- its time to clean the skimmer, or there is somthing causing the skimmer to not function efficiantly.

A skimmer also helps with 02 exchange in a very big way. Gotta recomend one. Is it absolutely necessary? No, but will it help, in many ways? Yes.

No hurry Miz, but find yourself a protein skimmer, of some sort. On a tank that size, it doesnt even need to be a very efficiant one, but add one, in the near future.

Just my 2 cents.