TotalPond pond skins Pond Liner, 13 by 20-Feet The 13 x 20 ft. PVC Pond Liner is ideal for large ponds up to 1,200 gallons, approximately 9 x 16 x 1.5 ft. The 14.5-mil PVC Pond Liner is lightweight, ultra-durable, and easy to handle. Our PVC liners are UV and puncture resistant, ensuring many years of continued use. TotalPond liners are reinforced with a strong polyester weave placed between the layers of PVC. TotalPond's pond skins pond liners have a textured surface to promote positive bacteria growth providing just the right foundation for an environmentally balanced habitat.