Now comes the fun part actually building your pond and turning your ideas and design into a beautiful tranquil area in your own back garden or yard. But be prepared to improvise, often like all things the build doesn't always go to plan. I know with my build I found that the foundations from my garage extended a lot further than I had thought they would, which meant that my pond got a bit narrower as it went down. To compensate for this I actually went a bit deeper where I could and changed the edging design so the pond wall on the other side could be pushed out a bit.
Steps to building a Pond in your own back garden
Marking it out
Once you have decided on your pond design it is time to start the actual building work. Either with a hosepipe, similar item or however you want, mark out roughly the edge of you pond.
Digging the pond hole
It is now time to start digging, remembering where you have decided to have shelves and how deep you are going to dig. One other point to remember is that the top of the pond must be level all the way round otherwise when one side is full, liner will be showing on the higher side.
Adding sand under the liner
A layer of soft sand could now be placed in the pond to help protect the liner/underlay from small stones or sharp objects. Obviously what can be covered by sand depends on the shape of you pond and if it has vertical sides it will be impossible to cover with sand, so just cover what you can. The bottom is the main area that may need extra protection. Please remember this step is not essential but will provide an extra level of protection for the line and also help level out the pond floor.
Insert liner and fill with water
This bit is fairly straight forward but be prepared to get a bit wet (and maybe cold depending on time of year), as from my experience the best way to make sure the liner is positioned correctly is to get in (without shoes) while you are adding the water. First of all get the liner into you hole roughly ensuring that enough liner is available all the way around the pond edge. Now start to add the water and as the water rises a few inches get in and make sure the liner is positioned correctly, ensuring it is firmly pressed into all corners/areas of the pond, making folds as required.
Remeber you can just add the water straight from the tap as long as you do not intend to add fish for a few days. If adding fish straight away you might need to pass the water through an RO (reverse osmosis) device to ensure the water is suitable for fish to survive in.
Install the edging on your pond
Edge your pond to hold and cover up the pond liner. I actually wouldn't do this straight way and would give the pond a few days to settle before finalising the edging and fixing it down.
Installing a pond pump and filter
Adding a pump, filter and UV is essential if you want your pond water to be clear. This is possibly not necessary to keep your fish alive but will mean that you will be able to see your fish swimming around. The pump will also keep the water moving so that you do not get stagnant water which can start to smell. See information of Pond Filters for more information.
Adding plants to your pond
You can now add your plants straight away remembering that different plants perform different job. The first essential type that must be added if you are keeping fish are oxygenating plants. Many other varieties of plants can be added to make your master piece more attractive.