This pond has a 44 mil liner to ensure a leak free swimming structure. The liner material is sensitive to sunlight and will eventually breakdown over the years if it is exposed. As a result, our team spent 3 days meticulously covering the entire pond liner with stone. Each small boulder is hand placed to ensure a perfect fit and not tear the liner in the building process. The amount of patients and effort by our crew is incredible and the result is always beautiful! The waterfall which adds to the natural feel of the pond was created with large stone shelves and a bog for natural filtration. All of our water features use natural filtration processes and no chemicals. We create a simulated bog which the water is pumped into and cleaned naturally though various levels of sand, stone and wetland plants.