How To Build A Koi Pond In Your Backyard. This is our process for installing backyard koi ponds: Remember, chlorinated water can be toxic for fish, including koi.
Beginning at this end, press the liner down along the inside edge and then along the bottom of the hole, working your way around the pond. Install the filters, pipes, and pump; A koi pond is a beautiful addition to have in your garden or backyard and can be very soothing to have around.
Lay down the underlayer and liner;
Don’t dig as deep as you want the pond to be all at once. A flexible pond liner also allows for creativity in forming the shape of your pond. The trench should be a foot deep all the way around the pond. Place the bags in the pond water and let the fish swim out.