Vevor | | 20 x 20 ft Pond Liner, 14 Mil Thickness, 3-Layer Reinforced PE Fish Koi Pond Liner for Outdoor Ponds, with Hemmed Edge | Black | Best Buy

This pond liner features a 14 mil thickness, reinforced PE outer layer, and an HDPE middle layer, reducing water leaks for long-term outdoor use. Four metal Buttonholes make installation simple—just lay the pond liner in place and secure it where needed. Ideal for ponds with plants and aquatic l

$51.76

Vevor | | Pond Liner, 20 x 25 ft 45 Mil Thick, Pliable EPDM Material Pond Skins, Easy Cutting Underlayment for Fish or Koi Pond | Black | Best Buy

To prevent your pond from losing water overnight, it's important to have a barrier between the water and the soil. Using VEVOR's 45Mil Pond Skins can prevent water from leaking out of the bottom of your pond. A koi pond liner is essential to keep dirt, debris, and contaminants away from your fish, w

$469.90