How to Build a Pond

April 18, 2018

We have a large Koi pond in our tropical section of our greenhouse and thus often have many inquiries as to how to build a pond. Well, here is our recommendation:

Before you start:

  • Choose a level site in an open location, preferably where it can be easily viewed from your house or patio.
  • Do not create a pond in a frost pocket or very exposed area.
  • Keep it away from overhanging trees – falling leaves will rot in the pond and roots may puncture the liner.
  • Choose a location where the pond water can reflect an attractive item like a statue or a plant.
  • Choose a place near water and electrical sources.
  • Flexible Liners can be shaped and sized to fit your needs and provide a natural look. Buy the heaviest liner that you can afford and choose black for the most natural look.
  • For the greatest durability EPMD rubber is the recommended liner material.

Building a pond:

A common mistake is to make a pond too small. If you want clear water, the pond should be at least 6 ft. x 4 ft. x 18 inches deep (1.8m x 1.2m x 45 cm). This is the recommended minimum size if you plan to have fish or plants.

How to calculate the required liner size:

Determine the maximum length, width and depth of you pond.
Double the depth and add it to both the length and the width values. Example if you want a pond that’s 6 ft. x 8 ft. x 2 ft deep (2m x 2.5m x 60 cm) you’ll need a liner that’s 10 ft. x 2 ft. (about 3m x 3.5m)