Thanks for the replies. I will make sure and try to keep it out from now on.
What I have found works pretty well around my pond is I leave about one or two swaths around the pond uncut. Then I make a pass throwing towards the pond those approximately two swaths out. This lets the tall grass catch the clippings keeping them out of the pond better. Then after making a few passes throwing the grass toward the pond, I finish by cutting those last two passes throwing the grass away from the pond. By cutting those last, they help keep the clippings out of the water.
