I suppose the real difference between this kind of pond and a rigid pre-formed one is that you usually do not need to attempt to sink the container in the ground and hide it
small koi pond
Small Water Features and Ponds | small water feature built on patio
Small Pond Designs | Small Pond
Goldfish Back Yard Water Ponds | goldfish-pond | Flickr - Photo Sharing!
I really want a backyard pond that has a little waterfall with koi fish and turtles.
Loving the Garden Pond by Chiot's Run
21+ Small Garden Backyard Aquariums Ideas That Will Beautify Your Green World
DIY backyard cattle trough fish pond - 22 Small Garden or Backyard Aquarium Ideas Will Blow Your Mind
creative water gardens | waterfall and pond for a very small garden or a corner of a garden.