I was walking around my pond today (1-20-2006) and noticed filamentous algae alive and well in the pond. It was green and seemed to be thriving growing on submerged limbs and even what looked to be like a large submerged mass of algae in one part of the pond. Is that normal for a pond in central Ohio in January? While there is no ice on the pond, the water is still very cold. I've never fertilized and had no problems with algae this past summer or fall. Any thoughts???