Bickal Koi Farm - Toddville Iowa - Optimizing Your Pond Liner - By Greg Bickal
MacCourt Small 9 Gal. 26 in. x 7 in. Polyethylene Plantainer Pond Liner PP2607 - The Home Depot
VEVOR Pond Liner, 30 x 35 ft 45 Mil Thickness, Pliable EPDM Material Pond Skins, Easy Cutting Underlayment for Fish or Koi Ponds, Water Features, Waterfall Base, Fountains, Water Gardens, Black | VEVOR US
500 gallon koi pond, liner 18” deep and in full sun.