Mini Pre-Formed Kidney Shaped Water Garden Pool. These wonderful preformed thick durable (3/16”) poly molded water garden pools are designed by Tricker’s. The kidney shaped design has been a most popular attribute in making a pool. No unsightly wrinkles as would occur if made from a rubber liner. Has a deep portion for the water lily and a shallow shelf for a bog plant such as a blue iris seen in the photograph. Dig a small hole, place the Mini Pre-Formed Kidney Shaped Water Garden Pool in the hole, fill with water and add your special aquatic plants...it is that simple! Can withstand harsh, cold winters. Only 10 lbs,, 16” H, 18” W, 38” Long, 15 gallons.