VEVOR Pond Liner, 6 x 7.6 m 45 Mil Thick, Pliable EPDM Material Pond Skins, Easy Cutting Underlayment for Fish or Koi Pond, Waterfall Base, Water Features, Water Gardens, Fountains, BlackProduct Features Keep Your Fish Safe By using a pond liner, you can prevent water and soil from seeping out of the pond and contaminating water resources. This will create a better living environment for your fish. Moreover, you can add aquatic plants, rocks, and wildlife to make your pond more attractive. 45 Mil Super Thick The pond liner is 20' x 25' in size and is designed to be puncture and tear resistant. This means that you don't have to worry