I went to change out the ducks pond today and it looks like little larva or maggots are in it! I have two Peking ducks. One male one female. They are aproximately 7 months old. The female just started laying about 3 weeks ago. I'm new to all this. Learning as I go. Is this a coincidence since she started laying. And I should add that she has laid a couple eggs in the pond. But consistently getting better at laying in the next. How do I prevent this? Treat this? Are the ducks at risk? Any help and advise would be greatly appreciated.