Brad, welcome to the forum. That is classic filamentous algae, or pond scum. It seems to grow in cool clear ponds. It will be gone as the water warms. It starts growing on the bottom and rises to the top when it breaks lose from the bottom. My pond is in Tylertown, 2 1/2 yrs. old, and had it last year. Probably this year. Havent seen the pond since Dec. If you can, just rake it to the shore and let it dry, or spray it with an herbicide. If you have a boat, scoop it up. Once you get a planktonic algae bloom, it will not grow anymore. It is discouraging, but not detrimental.
