Types of Pond Containers
The pond container is something to hold the water and prevent it from running away or seeping into the surrounding. These are available in a variety of materials and shapes, and they can be sunk into the soil to be flush with the soil surface or raised up to form a decorative feature. The cost can vary, depending on the material used and the size. Choosing the material and size will depend very much on your bank balance, your needs and where you wish to put the pond. Ensure that your choice leaves you with a pond that is neither too large for the garden nor too small for the intended fish.
A simple pond will need to have a surface area of at least 1.8m2 (20ft2) to support 10 small fishes. Remember that they are going to grow, so that for each 15cm (6in) of fish it is advisable to have 1800cm2 (2ft2). To allow not only for the growth of the fishes but also for them to multiply, it is always wise to make a larger pool so that it will cope with its fish population for a number of years. The depth is also important: if it is too shallow, the water will overheat in summer and freeze solid in winter. A deeper pond will allow a wider choice of plants as well as a varied selection of common and exotic fishes.
If you have a formal garden of regular beds and paths, the pond should be rectangular or circular to blend in with the existing arrangement. If, on the other hand, your garden is more natural, with random clumps of planting, meandering paths and a casual layout, then the pond should be as natural as possible, with an irregular shape and looking as if man had no hand in its formation.
With raised ponds where the surface is above ground level, a more formal or regular shape is best; only a rock pool backed by a cliff that cascades its overflow to ground level to be recycled back to the higher pool would look natural. Obviously a raised pond needs a substantial container to prevent the vast weight of water bursting the sides. The advantage of the raised pond is that it allows you to see the fishes and plants and study them closely without stooping.