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Pond planning 4/6:

The correct materials

You have decided where to install your pond, the size and the shape. Great! The next step is to choose one of the two following options:

Pond installation using a pre-formed pond:

  • Pre-formed ponds are sold in specialist aquatic shops or garden centres and are generally made from strong plastic or fibre glass. They are available in many different shapes and sizes and are usually formed into naturally curved basic shapes.  
  • The obvious advantages of pre-formed ponds is that the size, shape and depth have already been determined.  The rigid, hard shell of the pond also prevents roots penetrating the pond casing and causing damage and leaks.
  • The disadvantages are that you are limited in design, any expansion in the future will be difficult and, due to the pre-formed shape, it is hard work digging the hole with the accuracy needed. Also, in many ponds, the pre-formed plant shelves are not adequate.

Pond construction using a pond liner:


  • The construction of a pond using a pond liner is more cost effective and gives you greater flexibility to create your ideal pond. Landscape features discovered whilst digging the pond can usually be incorporated into the installation.
  • There are two types of liner available: polyethylene, which is environmentally friendly and remains soft and elastic for a long time and PVC liner which can be easily cut but contains no softening agents.

Related topics

A pond with pond liner in 7 steps

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