POND LINERS FOR OUTDOOR PONDS. Water and corrosion proof: The pond liner can effectively isolate negative substances in the soil, create a safe living environment for your KOI/Fish, ducks, turtles and others aquatic life.Aging and sunlight proof: The HDPE material is widely used for outdoor large-scale waterproof engineering. With very stable performance to temperature and climate adaptability. Could be used outdoor for over ten years.Two sides of the HDPE pond liner: Excellent performance in tear and punture resistance. But it's not as flexible as rubber material. HDPE works if you are looking for something durable, but may be not a good choice if you are looking for something flexible. = Open the box, unfold and spread out the liner. Let the sun bake it to soften it up, then help you to form it the way you want it.Mark out the pond outline. We suggest some regular shapes since HDPE material has no advantage in molding into small or irregular shapes.Excavate the pond, make side bank slopping inwards. Dig out deep areas and shallow areas. Remove shape objects and level the bottom.Put enough underlay to protect the liner contacting sharp objects. The underlay could be sand, discarded cloth or non-woven underlayment.Lay the pond liner carefully. Please don't dragging it to avoid any scratching may occur. Prepare enough smooth rocks for anchoring in advance.Anchor smooth rocks and fill in water GRADUALLY. The liner will stretch first, then move inwards to the shape of slope sides as water volume increase. When the liner is molded into the pond, you could anchor enough rocks and fill water. Put KOI/Fish in pond, add some lotus leaf for decoration. =