no.. I don't have any filters.. there are pics on the first page of this post that shows how I did the pond. I change the water everyday, its super easy peasy..
https://www.facebook.com/pages/The-Duck-Hut/193654187369638
shows pics and video -- I have added on twice since these pics
https://www.facebook.com/pages/The-Duck-Hut/193654187369638
shows pics and video -- I have added on twice since these pics