Bossone, nothing to worry about yet. It is a combination of things, all natural. Your pond is fresh and the newly exposed nutrients are producing an algae bloom, plus there are natural oils in the fresh dirt. Combine the main ingredients with the recent high heat/low wind conditions, throw in a couple cloudy days, and you get the slime cocktail film you're seeing. In a 2-4 weeks, you will have a new beneficial bacteria colony munching on the stuff and eliminating it.
