Ducks in the pond

How do I clean a very muddy pond?

I have a pond (natural, not man-made) that has a very thick heavy layer of mud on the bottom and the water is brown. I have no fish in the pond, although It did have once many years ago. I now have ducks in the pond, and although they seem happy I would like to make it a bit cleaner for them, if possible.

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  You are right. The ducks love it the way it is.
• If you want to clean it up a bit try some vegetation growing in pots or even at the sides. Irises work well as filters. There are flocculants that will clear up your water. Here's one:
• http://www.pondscapedesigns.com/floccula…