Hi, I live on about an acre. I'm considering building a duck pond, within my small orchard, which is where my chooks, geese and ducks forage during the day.

The pond would be about 3 metres in diameter.

I thought to use pond liner, unless someone can recommend something more environmentallly sound. My son's a concretor, so I could make a concrete lining.

Is there any way to make a duck pond self-sustaining, or is it necessary to constantly empty it out and add clean water?

Is it necessary to have a filtration or circulation system, run with electricity?

Any advice on making and maintaining a pond would be greatly appreciated.

Cheers,
Ona