Because it offers an unlimited potential for design, durability, and low maintenance, installing a pond using a liner is one of the most popular construction methods. It is so easy to use that one person can install a small water garden with little effort. When choosing a liner for your pond, look for a high quality pond liner that is plant and fish safe and resistant to UV light.
Outline your pond shape; avoid sharp corners as they will impede optimum filtration.
Design a series of levels or shelves:
• A small shelf should be made around the same width as the stone being used for the edging of the pond. This can often be achieved by removing a layer of sod. This first shelf is used to hide the liner and allows for the water level to be above the first layer of rock: generally 10 cm deep and 20 – 25 cm wide.
•The next shelf is used for planting marginal and/or bog plants: generally 20 – 30 cm deep, 20 – 25 cm wide.
• A 30 cm steep step helps deter predators.
• You may want to create a step for pond access - the step does not need to be created around the entire pond.
• The sides of the pond should be kept at a 90 degree angle to the bottom and not sloped to avoid predators from entering the pond.
• Depending on the region you live in, fi sh can be kept in ponds as shallow as 45 cm. Koi will require depths of 90 cm and more.
Installing the liner
Ensure that the plant shelves as well as the edges of the hole are level from side to side and end to end. Remove any stones or other sharp objects that may puncture the liner.
• Spread a layer of damp sand approximately 5 cm thick over the bottom and ledges and then cover with Geo Textile underlay – this will help protect the liner from sharp stones or tree roots.
• Position the liner evenly over the hole letting it warm in the sun briefly to make it more fl exible and easier to handle. Ensure that the center touches the base of the excavated hole.
• Place brick around the overlap. Leave a minimum of 0.6 m of overlap around the outer edge of the pond. Begin fi lling the pond with water. The liner will stretch and mold itself to the shape of the pond. As the liner settles, adjust the bricks as needed.
• When the pond is full, trim off any excess liner leaving an overlap of at least 15 cm. The surplus liner can be hidden beneath rocks or flat stones used to edge the pond. Paving slabs should protrude slightly over the pond to hide the liner from view.
• Finish it off with the ClearFlo Kit pump and filter system.