A pond liner in a natural swimming pond helps keep the water where it’s supposed to be by preventing it from seeping into the ground. Without a liner, water loss can be a big issue, especially in areas with sandy or porous soil. It also helps create a stable environment for plants and beneficial bacteria to do their job in keeping the water clean.
Some people use flexible rubber liners, while others go for a more natural approach with compacted clay or bentonite. The goal is to make sure the pond holds water effectively while still supporting a balanced ecosystem. A well-installed liner can last for decades, giving the pond a reliable foundation and helping maintain a clear, swimmable space.
