【Safety Material】Our Koi Pond Liner is constructed from high-quality HDPE material, offering excellent softness and extensibility. With a thickness of 20 mil, this liner is both UV and puncture resistant, ensuring long-lasting durability for outdoor ponds. Importantly, it contains no harmful plasticizers, making it a safe choice for prolonged use in any aquatic environment. 【Versatile Applications】Perfect for a variety of outdoor water features, this liner is ideal for backyard waterfalls, outdoor ponds, fish ponds, and koi ponds. Additionally, it has applications in construction, agriculture, surface protection, waterproofing, and various coverings, making it a versatile choice for multiple projects. 【Easy Cutting and Installation】This lightweight yet durable fish pond liner is designed for easy installation. It can be effortlessly cut to your desired dimensions and bends easily to fit various pond shapes, accommodating corners and irregular surfaces with minimal effort. 【Safe for Fish and Plants】This environmentally friendly pond liner is safe for both fish and plants. It effectively prevents harmful substances from the soil from contaminating the pond, thereby avoiding water pollution and creating a safe, healthy habitat for wildlife and aquatic life. 【Installation Tips】Before installation, ensure the pond is thoroughly cleaned, removing any compatible with sharp or hard objects. We recommend adding a layer of round pebbles to help relieve high water pressure, enhancing the longevity of your pond liner.