Pond Boss Forums INTRO Questions & Observations Do you have to have a filter on a pond

IMO it is definitely possible to get lake type clean, especially if you are not trying to grow fish. I would think about a well designed aeration system to provide good oxygen content for aerobic bacteria to thrive (bio filter) and pond dye to limit sunlight penetration to reduce/suppress algae and vegetation. I would also consider a minnow species to control mosquitos. Once you're up and running, you can supplement control with appropriate chemical applications should need arise.

....Just my 1 cent

Edit: I would also cover the liner with 18 inches minimum of soil, sand, etc. to protect it and to provide substrate for the aerobic bacteria.