The Trend for Natural Swimming Pools Instead of Traditional Ones

Natural swimming pools, or bio-pools, are becoming an increasingly popular alternative to traditional chlorinated bodies of water. This is not just a swimming area, but a living ecosystem where water purification occurs naturally, thanks to plants and microorganisms, without the use of chemicals. This approach allows you to create not only a functional but also a harmonious addition to the landscape on your property, which requires specific, but generally less burdensome, long-term care.

What is a Natural Swimming Pool and How Does It Differ from a Conventional One?

A natural swimming pool is an artificially created body of water in which water is purified by biological methods, without chemical reagents. Unlike conventional pools, where water circulation and filtration often involve the use of chlorine or other disinfectants, a natural swimming pool consists of two main zones: a swimming zone and a regeneration zone. The regeneration zone (or biological purification zone) is planted with aquatic plants and inhabited by microorganisms that absorb nutrients from the water, preventing algae growth and maintaining its purity. This creates a unique, living environment, resembling a natural pond, but designed for safe swimming.

Advantages and Disadvantages

The choice in favor of a natural swimming pool is driven by a number of significant advantages, but it is also important to consider its specific characteristics.

Advantages:

• Eco-friendliness: The absence of chemicals makes the water safe for skin, eyes, and the environment. This is an ideal option for allergy sufferers and those who care about nature.
• Aesthetics: Natural swimming pools harmoniously blend into any landscape, creating the feeling of a natural body of water. They attract birds and insects, enriching the biodiversity of the property.
• Low operating costs: After installation and ecosystem maturation, there are no chemical costs, and the pump's electricity consumption is usually lower than that of traditional filtration systems.
• Uniqueness: Each natural swimming pool is individual; it can be adapted to any design and property size.

Disadvantages:

• Required area: For effective operation, the regeneration zone must occupy 30% to 50% of the total water surface area. This means that for a 20 m² swimming zone, the total water body area can be 40-60 m², which is not always suitable for very small plots (less than 6-8 ares).
• Initial investments: The construction of a natural swimming pool can be comparable to or even slightly more expensive than a conventional one, due to the need to create a complex zoning system and plant a large number of plants.
• Time for maturation: The ecosystem requires time (from several months to 1-2 seasons) to fully stabilize and achieve optimal balance.
• Specific care: Although chemicals are not used, regular cleaning of fallen leaves, plant control, and periodic removal of bottom sludge are required.

Main Types of Natural Swimming Pools

There are several approaches to creating natural swimming pools, which differ in the degree of integration with the environment and purification technologies.

1. Bio-pools (Swimming Ponds Type 1-3): These are the most common type. They have clearly separated zones for swimming and regeneration. The regeneration zone uses special filtering plants and gravel layers through which water passes. Pumps are often used for water circulation. The depth of the swimming zone is usually 1.2-2 meters, and the total area of such a pool for comfortable swimming starts from 50 m².
2. Swimming Ponds (Swimming Ponds Type 4-5): These bodies of water are as close as possible to natural ponds. The swimming and regeneration zones may be less strictly separated, and purification occurs due to more extensive shallow water zones with diverse vegetation. Water circulation can be natural or minimal, using pumps. They look wilder and blend organically into large, natural landscapes. They require even more space, as the proportion of the regeneration zone can reach 70%.

The choice of type depends on design preferences, available area, and the desired level of intervention in the ecosystem.

Site Selection and Planning Criteria

Proper location and planning are key to the success of a natural swimming pool.

• Sunlight: Choose a location with maximum sunlight (at least 6-8 hours a day), but avoid direct sunlight on the swimming zone during peak heat to prevent excessive water blooming. Sunlight is essential for plant growth in the regeneration zone.
• Proximity to trees: Try to avoid locating under deciduous trees, as fallen leaves can contaminate the water and disrupt the ecosystem's balance. If unavoidable, provide effective leaf collection systems.
• Site slope: A slight natural slope can be used to create cascades or streams that improve water aeration, but a steep slope will require significant earthworks and bank reinforcement.
• Accessibility: Ensure easy access for construction equipment during creation and for subsequent maintenance.
• Size: For comfortable swimming, even in a small pool, the minimum length of a swimming lane should be about 5-7 meters, with a width of 3-4 meters. Considering the regeneration zone, this will require a water body area of at least 50 m².

Construction Stages: From Idea to Implementation

Creating a natural swimming pool is a complex project that requires careful planning.

1. Design: Development of a detailed plan, including the size, shape, depth of the swimming and regeneration zones, location of pumps, filters, and plants. At this stage, it is important to consider the site's topography and the architectural style of the house.
2. Earthworks: Excavation of the pit according to the design. This is the most labor-intensive stage, requiring special equipment.
3. Waterproofing: The bottom and walls of the pit are covered with geotextile, and then with a special liner (EPDM membrane), which ensures complete watertightness. It is important to carefully secure the edges of the liner.
4. Creating regeneration zones: Formation of terraces for plants, laying of filtering gravel or crushed stone, installation of a water circulation system (pipes, pumps).
5. Planting: Planting specially selected aquatic plants in the regeneration zone. They should be native and suitable for the climate, for example, yellow flag iris, cattail, common reed, water lilies.
6. Filling with water: Slow filling of the pool with water, preferably rainwater or well water, to minimize chlorine and other substances that can disrupt the ecosystem's balance.
7. Launch and maturation: After filling, the water will need time to establish biological equilibrium. This can take from several weeks to several months before the water becomes crystal clear and ready for swimming. During this period, it is important to avoid active use and carefully monitor the water's condition.

Care and Maintenance of a Natural Swimming Pool

Although a natural swimming pool does not require chemicals, it needs regular, but specific, care.

• Daily/weekly care: Skimming floating debris (leaves, insects) from the surface with a net. Checking the water level and topping up if necessary. Monitoring plant growth.
• Seasonal care: In spring – pruning dead plant parts, cleaning the bottom of large debris and bottom sludge (especially in the first years). In autumn – thorough collection of fallen leaves, preparing for winter (if the pond freezes, ensure aeration to prevent fish from dying, if present).
• Periodic cleaning: Every 3-5 years, a deeper cleaning of the bottom from accumulated sludge and sediment may be required. Special underwater vacuums are usually used for this, or the pool is temporarily drained. A typical mistake is ignoring sludge accumulation, which leads to deterioration of water quality and algae growth.
• Plant control: Regular thinning of plants so that they do not overgrow and shade the swimming zone, as well as removal of invasive species. For example, cattails can quickly take over large areas if not controlled.

Common Mistakes in Construction and Operation

Some mistakes can seriously complicate the operation of a natural swimming pool or even lead to the need for its reconstruction. Avoid them:

• Insufficient regeneration zone area: This is the most common and critical mistake. If the plant zone is too small (less than 30% of the total area), the purification system will not cope, and the water will bloom. Many, striving to increase the swimming area, skimp on the biofilter.
• Incorrect plant selection: Using unsuitable or too aggressive plants can disrupt the ecosystem. For example, some types of algae or fast-growing grasses can stifle beneficial filtering plants. You can read more about plant selection in the article [/blog/ozelenenie-uchastka](/blog/ozelenenie-uchastka).
• Poor quality waterproofing: Liner leaks or improper geotextile installation will lead to water leakage and require costly repairs.
• Lack of drainage around: Especially important on sites with high groundwater levels. If groundwater presses on the liner from below, it can lead to its damage or deformation.
• Excessive use of chemicals at the beginning: Some try to accelerate the maturation of the ecosystem by adding chemicals. This can destroy beneficial microorganisms and slow down the natural purification process.
• Ignoring seasonal cleaning: Accumulation of organic material (leaves, branches, dead plants) at the bottom leads to the formation of sludge, which becomes a source of nutrients for undesirable algae.

How to Plan a Natural Swimming Pool with FormSpace

Planning a natural swimming pool requires a careful approach to site zoning, and FormSpace can be an indispensable tool here. Start by uploading your site plan to the 1.1 Site Plan or 1.2 Zones module. This will allow you to accurately determine the available area and consider various options for the location of the water body relative to the house, other buildings, and existing landscape elements. You can experiment with the shape and size of the swimming and regeneration zones using the object drawing and zoning functions to visually represent how the pool will look and how much space it will occupy on the property, for example, 50, 70, or 100 m².

Next, use the 2.1 AI Concept module to generate landscape design ideas that include a natural swimming pool. You can specify the desired style (e.g., “natural”, “eco”, “modern”) and indicate the presence of a water body. The AI generator will offer various concepts that will help you visualize how the natural swimming pool integrates with the surrounding vegetation, paths, and recreation areas. This will help avoid errors in scaling and combining elements, and also allow you to assess in advance how the water mirror will reflect the sky and trees, creating a unique atmosphere on your property. For further detailing of plant placement, you can use the tips from the article [/blog/sovety-po-landshaftnomu-dizaynu](/blog/sovety-po-landshaftnomu-dizaynu).

FAQ

How safe are natural swimming pools for health?

Natural swimming pools are considered very safe for health. The absence of chlorine and other chemicals eliminates skin and eye irritation, as well as allergic reactions. The water in such pools is close to drinking quality, as it is purified by natural methods. The main thing is to correctly design and maintain the ecosystem to avoid excessive algae growth.

Can you build a natural swimming pool yourself?

Theoretically yes, but it is a complex project requiring knowledge in waterproofing, hydraulics, plant biology, and landscape design. Incorrect zoning or material selection can lead to water quality problems and the need for costly rework. For small decorative ponds, this is possible, but for a swimming pool, it is better to consult specialists.

What is the cost of building a natural swimming pool compared to a conventional one?

The initial cost of building a natural swimming pool is often comparable to or even slightly higher than a traditional one, due to the volume of earthworks, the cost of quality waterproofing, and plants. However, in the long term, the operating costs of a natural swimming pool are usually lower, as no chemicals need to be purchased and less electricity is consumed.

What plants are best suited for the regeneration zone?

Aquatic and riparian plants that effectively absorb nitrates and phosphates and oxygenate the water are suitable for the regeneration zone. Examples include yellow flag iris, cattail, common reed, flowering rush, water mint, and various grasses. It is important to choose native species that are resistant to the climatic conditions of your region.

How often does a natural swimming pool need to be cleaned?

Daily or weekly surface cleaning of floating debris is desirable. Seasonal cleaning (spring and autumn) is necessary to remove dead plants and large bottom sludge. A deeper cleaning of the bottom from accumulated sludge is recommended every 3-5 years. Regularity depends on the size of the pool, the number of plants, and the surrounding environment.

Can you swim in a natural swimming pool in winter?

In regions with cold climates, natural swimming pools freeze in winter, just like ordinary ponds. Swimming in them at this time is not possible. However, if the pool is deep enough (more than 1.5-2 meters), it can serve as a wintering place for some aquatic inhabitants and retain its beauty, covered with ice and snow. It is important to ensure water aeration to prevent fish from dying, if they inhabit it.

What permits are needed for construction?

The requirements for permits for water body construction vary greatly depending on local legislation and the size of the planned pool. In some cases, permits may not be required for small ponds, but for large swimming pools, approvals from local authorities may be necessary. It is always recommended to check local building codes and regulations in advance to avoid problems.

A natural swimming pool is an investment in the beauty, health, and harmony of your property. It requires a thoughtful approach during the planning stage and specific care, but in return, it offers a unique opportunity to enjoy clean, living water integrated into the natural landscape. If you are ready for such a project, start with detailed planning and studying all the nuances so that your natural oasis brings you joy for many years.