Koi Pond & Water Garden Liners
Water gardens bring serenity to your backyard. They include aquatic plants and flowers, and may support koi. Water gardens can be small and only need 2 feet of depth. If you strike the perfect balance between fish and plants, you may not need a pump or filter system. Water plants thrive in calm water, so minimize any current from waterfalls and fountains.
The most popular water garden liner materials are Polypropylene and Fish Grade PVC. Both materials are safe for plants and fish. PVC is easy to patch with adhesive and costs less, but degrades from the ultraviolet rays (UV) in sunlight. Polypropylene has excellent UV resistance, but has to be patched with a hot air welder.