Ducks and mud

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.

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…

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Natural Bottom Pond

Question:
How do I get rid of the grass in my pond?
I have a medium sized pond that has a lot of fish in it and a lot of grass too. I want to get rid of the grass so I can cast my reel and catch something other then grass and lily pads. What can I use to do this?

Answer:
You will have to rake the grass out. If you want to have a fishing pond, the rules are different than if you want an ornamental one.
Get a small flat bottomed boat and a rake. Rake the grass into the boat and deposit it into your compost heap when you are done. Be prepared for a dirty, nasty job.
BTW, any chemicals that kill the grass will also kill the fish.