A large outdoor pond requires more planning and careful construction than a small pond, to achieve a satisfactory result. For example, when excavating a large pond there will be a large amount of waste soil and muck to dispose of, possibly needing a supply of skips and maybe a mini-digger too. Ensuring that the water-level is even will likewise take more time and cannot be skipped or rushed. You can get away with cutting less corners, the bigger the pond is, so plan, plan, plan.
Choosing the Location
The location of your pond will dictate much about its design. You need a large area that you can excavate to create the pond, but you also need to place the pond somewhere where you will actually be able to enjoy it. Placing it too far from your house or away from the most popular areas of your garden will limit its use. Also, putting it too far from your water and electricity source will make it difficult to create and maintain. If you intend to incorporate plants into the garden pond design, choose a location that will get at least two hours of sunlight a day.
Maintaining a Biological Balance
One benefit of a large garden pond design is the ease of maintaining a biologic balance in the pond. Keeping algae at bay and creating the right balance of bacteria to maintain the nitrogen cycle is much easier with a large aquatic environment than a small one. To encourage the growth of these bacteria, include bio-filtration material throughout the pond’s design. Also, larger pond designs give Koi fish and other wildlife more room to grow and thrive. Just make sure the design is not so large that you would have trouble removing any dead fish, as you will likely have some casualties over the years that you maintain the pond.
Depth Is Important
The surface area of the pond is not the only consideration to make when determining its size. You also need to make sure it is deep enough to sustain the life you intend to put inside. Fish and water plants need at least 18 inches of water depth in their ponds. If you intend to put large fish, like Koi, you will need 24 inches or more in depth. A pond that has a large surface area but is very shallow will be dangerous to the fish and plants because of the temperature fluctuations common in most parts of the country.
Other Considerations for Large Garden Pond Designs
Removing debris from large garden ponds is quite tedious. One way to limit the amount of time you have to spend tending to your pond is to use a surface skimmer. The skimmer will suck in water form the surface of the pond and strain out any large pieces of debris. While you will still need to maintain the pond from time to time and remove large leaves and other pieces of debris, a skimmer will help make the task simpler. Also, when creating a large pond design, be sure to plan for adequate aeration and temperature control of the water. Purchase heaters and filters to effectively maintain a pond the size you intend to create.