Ponds

Swimming pond

Do you want a self-sufficient, ecologically balanced swimming pond without pumps, filters or chemicals? With Simons pond check you easily set up your own swimming pond. Avoid mistakes and save at least €1000 with the expert Pond Advice Book. Order all essential aquatic plants and supplies easily through our webshop.

Swimming pond

Pond supplies

Complete Plant Filter Pond Package
Pond vacuum cleaners
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Skimmer pond
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Constructing a swimming pond

Want to build your own swimming pond? On this page we give you the complete guide, from planning to maintenance, so you can realize the swimming pond of your dreams. For detailed advice, order our Pond Advice Book, full of professional tips to get the most out of your project.

A swimming pond combines the natural beauty of a pond with the comfort of a pool, offering an eco-friendly alternative without chemicals. A well-designed plant filter keeps the water clear and allows you to enjoy a healthy, natural environment. Follow our five steps to build your swimming pond.

Constructing a swimming pond

DIY swimming pond construction in 5 steps

  • Step 1: Planning and Design
  • Step 2: Excavation and Technical Preparations.
  • Step 3: pond liner Application
  • Step 4: Setting up the Plant Filter
  • Step 5: Maintenance and Fish
swimming pond construction

1. Planning and design

Designing your swimming pond is all about balancing aesthetics and functionality.

Style and Material Selection:
Choose materials that blend seamlessly with the style of your garden to create a harmonious whole. Also consider adequate space for lounging and sitting areas around the pond.

Location and Size:
Choose a sunny spot so the water can warm up optimally and avoid spots under trees to avoid contamination from leaves. Provide a spacious filter area at least twice the size of the swimming area for effective natural filtration and clear water.

Depth and Layout:
Make a sketch with the desired dimensions and depths: the swimming area should be 1.50 to 1.80 meters deep and the filter area between 40 and 50 cm deep. Place a partition between the swimming and filter area, for example an L-profile or a wooden/stone edge just below the water surface. This will prevent the filter material from entering the swimming area.

build a natural swimming pond

2. Excavation and Technical Preparations.

Mark the outline of the pond with stakes and ribbon and start digging. Make sure the walls are solid, especially with a deep swimming area, to avoid collapse risks.

Technical Installations for Water Circulation (Optional):
Consider installing a pond pump to circulate water, which can further improve water quality. For a natural look, conceal technical equipment such as a pump or filter unit in a pit or separate technology room.

Separation between Filter and Swim Area:
Place a partition just below the water surface to keep plants and substrate in the filter section. This ensures a clear swimming area without plant debris or substrate particles.

3. pond liner Applying

Use high-quality EPDM liner for lining your pond. This material is durable, stretchy and gives the pond a natural look, while its black color allows the water to warm up better. EPDM liner also offers extra security, often with a warranty of up to 30 years.

Protective cloth:
Place a protective cloth under the liner to prevent damage from sharp objects such as roots or stones. Finish the edges neatly with hardwood cover battens or stones for a clean and natural look.

Natural swimming pond construction

4. Setting up the Plant Filter

Substrate and Planting:
Cover the filter area with 30 cm pond substrate and place carefully selected aquatic plants that help filter the water. The substrate is porous, allowing beneficial bacteria to develop easily and contribute to water purification. Fill the filter section gradually with water so that the substrate fills up well and the plants can take firm root.

Plant Species and Circulation:
Choose marsh plants and substrate plants that provide biological filtration. Creating good circulation between the filtration and swimming areas (such as with an underwater connection) keeps the water optimally clear without affecting the swimming experience.

5. Maintenance and Fish

A well-designed swimming pond with an extensive plant filter requires minimal maintenance. Use these tips to ensure a clear and healthy water environment:

Fall maintenance:
Remove excess plants and prune them to about 20 inches above the water surface. Add additional Bacta Clear pond bacteria in September to break down dead leaves and reduce bottom silt.

Spring maintenance:
Replace some filter plants as needed and add bacteria again to keep the filter in top condition. This promotes a stable biological balance and provides clearer water.

Fish or No Fish:
Although a swimming pond without chemicals is suitable for fish, they bring additional pollution and some visitors may be less comfortable swimming with fish. Should you still want fish, consider a separate swimming and fishing area with, for example, a subtle waterfall as a divider.

By planning your swimming pond with care and following these guidelines, you will create a natural swimming environment that you can enjoy for years to come. Have fun with your own piece of nature right in your garden!

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Natural swimming pond construction

Nature pool

Use the fall or winter months to build a swimming pond. That way you can enjoy a cooling dip in the spring and especially in the summer! Given the increasingly hot summers, this is certainly not an unnecessary luxury.

Choosing between a traditional pool and a natural pool can be tricky. A regular pool with crystal clear water is often associated with the ultimate vacation feeling. However, a swimming pond or natural pool is an environmentally friendly alternative that does not require chemicals such as chlorine or heating. aquatic plants provides natural filtration and keeps the water clear and pure. As for cost, generally the initial cost of a natural pool is lower than that of a traditional pool.

A major advantage of a swimming pond is that it is relatively easy to build yourself. An important part of this is the plant filter. Thanks to our years of experience we can give you excellent advice. All supplies for a filter and the plants we can deliver to you from our own nursery.

How does a natural pool work? Constructing a filter section with purifying and visually appealing aquatic plants creates a natural filtration system. Pond plants with a good root system will naturally filter the water. The result is clean water in which you can enjoy swimming. You have the reassurance that you are not swimming in water containing chemicals and that you are contributing to improving nature in a biological way.

Whether you choose the sparkling look of a traditional pool or the rustic charm of a natural pool, both options have their own unique benefits. Read on in our comparison chart below to make the perfect choice for your garden.

Swimming pool vs natural pool

Pool Swimming pond

Pool

Nature pool

❌ Regularly ✅ Limited
❌ Yes ✅ None
❌ Higher ✅ Bearing
❌ Neutral ✅ Of course
❌ Limited ✅ Optimal
❌ Risk ✅ Safe
❌ Neutral ✅ Promotes
❌ Higher ✅ Bearing
✅ Flexible ❌ Limited
❌ None ❌ Present

Frequently asked questions about swimming ponds

Pond Advice

Yes, it is absolutely possible to make your own swimming pond, although it is a sizeable project. Getting started yourself can save you costs, but it does require time, patience and the right tools and materials. However, the satisfaction of completing such a project is unmatched.

Construction of a swimming pond can range from a few weeks to a few months, depending on the complexity of the design, the size of the pond and weather conditions.

A swimming pond generally requires less energy than a traditional pool because it does not involve heating or chemical treatment processes. Energy costs for a swimming pond depend mainly on any pumps or filters used.

Annual maintenance costs for a swimming pond vary, but on average you can expect between €100 and €500. These costs include plant care, pond bacteria, pond maintenance materials and any repairs.

For a natural swimming pond, oxygen plants such as hornwort, elodea densa and pond weed are ideal. Marsh plants such as reeds, great reedmace and sweet flag also help purify the water and provide a natural look.

Pond inspiration and examples

Constructing a swimming pond

Constructing a swimming pond is a great way to combine the natural beauty of a pond with the functionality of a swimming pool, creating a unique and ecological swimming experience in your own garden. The construction usually integrates a separate area for plants, which naturally purify the water, providing a clear and healthy swimming environment. The process of constructing a swimming pond requires careful planning and design to create a balanced ecosystem, taking into account aspects such as size, depth, water purification and plant selection.

Different types of natural swimming ponds

Natural swimming ponds have a wide variety, making them a unique addition to any garden. Depending on personal preferences, you can opt for sleek, modern designs that resemble conventional blue pools, requiring a solid foundation and separate space for the plant filter. For those who lean more toward an authentic natural look, there are swim ponds that blend seamlessly into the landscape. This can be achieved with subtle separations such as a hardwood shoring underwater. There are also design options such as pond fountains or waterfalls that provide natural flow between the filter and swimming areas. As for pond edges, the possibilities are endless. From seamless transitions from the grass to the pond to wooden decking that floats above the water, sometimes combined with a water ladder. Finishes can be designed to hide the pond edges for an aesthetically pleasing look.

Advantages and disadvantages of a swimming pond

Each option comes with its own set of advantages and limitations. A swimming pond flaunts natural splendor and offers ecological benefits, while a traditional pool may be simpler to set up and maintain. Here are some comparisons between a swimming pond and a swimming pool:

  • Costs: A swimming pond is often more economical to construct. The investment is mainly pond liner, pond plants and pond substrate. On the other hand, a pool can be more expensive because of the required foundation and equipment.
  • Aesthetics: A swimming pond offers a natural look that attracts both people and pond animals. In contrast, the typical light blue of a swimming pool can appear less natural.
  • Maintenance: Thanks to a natural plant filter, a swimming pond requires minimal maintenance. In contrast, a swimming pool often requires chemicals and special equipment to keep the water clear.
  • Shape and design: A swimming pond can be constructed in any natural shape, whereas a swimming pool often has a standard rectangular shape.
  • Ecology: A swimming pond is completely biological thanks to the presence of aquatic plants and pond bacteria, eliminating the need for harmful chemicals.
  • Year-round enjoyment: Even outside the swimming season, a swimming pond is a joy to behold and a nice place to be because of the vibrancy of plants and animals. A pool, on the other hand, often covered, can look deserted out of season.

Cost of natural pool

A swimming pond versus a conventional pool: which is more financially advantageous? A natural swimming pond is generally less expensive than a conventional pool. For those considering installing a pool in the garden, the swimming pond is a cost-effective and environmentally friendly alternative. The distinction between the two lies mainly in the filtration method: traditional swimming pools use chlorine and filtration systems, while swimming ponds employ natural filtration of aquatic plants in pond substrate . Investment costs vary considerably: a standard 4×10-meter pool ranges between €25,000 and €40,000. By comparison, a swimming pond of the same size with an essential plant filter of about 8×20 meters costs on average around €15,000, especially when using quality pond liner. Still, costs can vary depending on material selection, surface area, shape and plant selection. Despite the initial cost, a well-designed swimming pond offers the advantage of self-sufficiency and minimal maintenance. When considering dimensions, it is important to keep in mind a 1:2 ratio (swim section to plant filter) for optimal functionality.

The difference between a swimming pool and a natural pool

In the hot summer months, it is nice to cool off in a pool of water. Many people immediately think of the sea or a swimming pool. This is not surprising because pools are everywhere and there are many different types of pools such as a subtropical pool or a tropical pool. A natural pool is a beautiful and environmentally friendly alternative for your garden if you are looking for a place to swim.

Which pool is best for your garden depends on how much land you have and how big your budget is. In the case of people with small gardens, an inflatable pool is the best pool to buy.

If you like more of a natural effect in your garden, it is best to build a swimming pond in the garden. This natural pool contains natural water which means that no chlorine is used, which is the case with a swimming pool.

Also, a swimming pond requires much less maintenance than a pool because it is a natural water source and a swimming pond is a lot cheaper to build and maintain.

Natural pools and traditional pools pros and cons

Disadvantages of a non-natural pool:

  1. Your pool needs regular cleaning which takes a lot of time.
  2. A water pump and a chlorination system must be purchased to keep the pool water clear and clean, unfortunately these resources are expensive to purchase and consume a lot of electricity.
  3. Chlorine must be added to pool water to keep pool water healthy. Chlorine is not good for the skin because it contains chemicals.
  4. Animals that end up in the pool have difficulty getting out of it because of the straight walls a pool has.

Advantages of a natural swimming pond:

  1. For nature lovers, a swimming pond is ideal because it can be seamlessly integrated into your garden due to the natural look a swimming pond has.
  2. A swimming pond costs on average about 40,000 euros less in construction, this make swimming ponds a great alternative for people looking for a cost-saving alternative.
  3. A swimming pond requires little to no maintenance and no chlorine derivatives need to be added to the water to keep it healthy. In fact, filtering water is done by planting different types of aquatic plants in the pond, which makes the swimming pond virtually maintenance-free. You can also choose to build a plant filter in your pond. A plant filter you can easily build yourself.

Building a natural swimming pool in 4 steps

  1. The depth and shape of a swimming pond play a major role in determining how the pond should be dug. A plan of the yard should be made showing the desired pond design. The location of the plant filter or natural marsh should be considered when making the design. Once this is done, use markers to indicate where the excavation for the pond should take place in relation to other elements in the garden.
  2. The necessary excavation work must be done to build a swimming pond. The deeper the swimming pond, the more soil must be stabilized to prevent groundwater from becoming a problem. The walls of your swimming pond must be well solid to prevent collapse, with deeper pools requiring heavier and sturdier walls. A very important part of the swimming pond is the plant filter. An optimal depth for this component is -40 cm from the water level in the pond. The shoring between the swimming area and the filter part of the pond should be placed about -10 cm under water to keep pond substrate and aquatic plants out of the swimming area.
  3. Once the bottom, walls and filter area are solid and ready, you can start applying a good rubber liner. We recommend using rubber liner or EPDM pond liner because it will last for at least thirty years, making it much more durable than PVC liner. When installing the liner, make sure that you cover it properly at the edges, for example with hardwood cover battens or stones.
  4. Once the pond liner is in place, the plant filter can be set up in your swimming pond. First start with a layer of pond substrate of 20 cm, but do not fill the pond with water yet. Plant the chosen pond plants (read more about aquatic plants below ) in the layer of substrate, this will give the pond plants a solid base. Then pour in about 10 cm pond substrate , so at the same height (or just below it) as the wooden or stone barrier that is under water. This is how you create a natural filter. Next, fill the entire pond with water and add pond bacteria for a good start. Keep in mind that it will take a few years for the filter to work optimally because roots need time to grow over the entire surface.

aquatic plants nature pool

When it comes to plants for a swimming pond, there are many great species to choose from. For starters, water lilies are an excellent addition because their large leaves provide the water with shade which prevents algae formation, they also serve as hiding places for your pond fish or other pond animals. In addition, aquatic plants such as the iris, pickerel weed and the great reedmace provide a natural looking bank along the perimeter of your pond. Underwater oxygen plants such as elodea densa and moss balls help filter pollutants from the water and add oxygen to the water. If you want to place a nice mix of pond plants in your swimming pond, it is recommended that you purchase a pond plant kit.

The best location for a natural swimming pool

For a swimming pond, it is important to choose a location in the garden where there is sufficient sunlight for about six hours a day, in order to promote the growth of aquatic plants . I recommend that you do not place the swimming pond next to a tree, as the leaves that fall from the tree can contaminate the water and thus require extra maintenance.

Swimming pond plants

Choose swimming pond plants from our own organic aquatic plant nursery, with 100% growth and flowering guarantee. Our swim pond plants simplify maintenance as the plants independently keep the pond clear and balanced. With a swimming pond with plants, you maintain the natural character of the swimming pond.

Swimming pond pump

Looking for a pump for your swimming pond? Check out our range of pond pumps and discover sustainable alternatives for a clear and healthy swimming pond without a pump. With a well-designed plant filer full of plants, you can enjoy clear and clean swimming water all year round without power costs.

Pond filter

A mechanical swimming pond filter removes dirt and algae from the water, but plants can do this just as well. Setting up your pond with the right plants will keep the water clean and make it better for nature and easier to maintain.

Swimming pond vacuum cleaner

A swimming pond vacuum cleaner helps remove dirt and sediment from the bottom, but with natural ponds we recommend that this be done as much as possible by aquatic plants. Plants in the pond naturally provide clean water and a healthy ecosystem, making a vacuum cleaner less necessary. This way you maintain the balance in your pond without excessive use of technology.

Pond skimmer

A swimming pond skimmer removes floating debris such as leaves and twigs from the surface of the water, but in a natural pond aquatic plants does this in a more sustainable way. By using the right plants, you keep your pond clean without relying on technical aids. This creates a natural balance and less maintenance on your pond.

Pond air pump

A swimming pond air pump provides extra oxygen to the water, but in a natural swimming pond, oxygen plants do this job much more effectively. Plants keep the pond balanced naturally, reducing your reliance on technical equipment. This contributes to a healthier ecosystem and reduces the maintenance of your pond.

Pond uv lamp

A swimming pond UV lamp helps kill floating algae and bacteria, but in a natural swimming pond, aquatic plants provides better results. Plants keep the water clear and healthy without the use of technology. This promotes a natural balance in the pond, reducing your maintenance and creating a more environmentally friendly solution.