Imagine taking a bath in crystal-clear water with no chemical smell, surrounded by vegetation and with the feeling of being in a private lake. biological pools or natural swimming pools They are gaining ground because they combine aesthetics, health and sustainability in a truly appealing proposition.
Beyond fashion, these are facilities designed to function as a balanced aquatic ecosystemThey don't use chlorine or harsh chemicals, they blend seamlessly into the garden, and they require different care than a traditional swimming pool. And yes, the result is as beautiful as it is practical when properly designed and maintained.
What is a biological pool (or ecological pool)?
A biological pool is a pool that does without chemicals and keeps the water clear through a biological filtration Based on plants, gravel, and microorganisms, this system replicates what happens in nature, continuously purifying and oxygenating the water.
- Regeneration zone: an "aquatic garden" with purifying plants and mineral substrates that clean the water.
- Bathing area: the area designated for swimming and relaxing, similar to a traditional swimming pool.
Water circulates constantly between both areas, ensuring its oxygenation and natural cleansingIn the plant area, species such as reeds, reeds, lilies and water hyacinths, which work together with beneficial bacteria to purify without chlorine.
The engine of biological filtration
The heart of these pools is in the biofiltrationThe mixture of gravel and other substrates provides a surface for microorganisms to thrive, breaking down nutrients and suspended particles and keeping the water biologically pure.
In addition to plants and substrates, other factors may also be involved water currents and, in some designs, fishalways adjusted to the system's balance. The whole system forms a stable ecosystem that avoids the use of chemicals and reduces the need for intensive treatments.
This approach requires respecting the biological balanceWhen the plants are healthy and the bacteria do their job in the substrate, the water remains clear and in good condition for bathing.
Benefits that set it apart
In addition to operating without chlorine, biological pools offer a number of benefits and advantages that go beyond aesthetics and are noticeable from the first dip, especially in people with sensitive skin or allergies.
- Chemical-freeThe water is kind to the skin and eyes; forget about irritations and strong odors.
- HealthierThey promote relaxation by bathing in a natural environment, with a different sensory experience.
- BiodiversityThey attract beneficial flora and fauna, creating small habitats that enrich the garden.
- EfficientThey require less replenishment water and, with proper care, simpler maintenance than conventional ones.
The landscape component is another strong point: the organic forms, the stone or wood borders And the integration with the greenery makes the pool a key element of the garden, with a serene and highly decorative effect.
Landscape design and integration
This type of installation not only respects the environment; integrates and regeneratesThe swimming pool ceases to be an isolated element and becomes a landscape asset that adds value to a home, a hotel, or even a public space.
With a good design, a bio-pool can be as contemporary or as rustic as you want: Design and nature go hand in handmerging architecture, health and sustainability without sacrificing comfort.
Many current proposals advocate for a very natural reading of waterChlorine-free and free of harsh chemicals, yet with a carefully considered aesthetic that harmonizes with the surroundings. It's a conscious way of understanding the garden and enjoying it year-round.
Construction, timelines and costs: what you need to know
Before starting, it is advisable to do a analysis of the filling water To adjust the design: pH, hardness and mineral content help to choose the right plants and plan the substrate.
The excavation is planned with different depthsThis is based on the plant species in the regeneration area and the bathing area. This ensures that each plant has the appropriate water column for its development.
The glass is waterproofed with a high quality plastic membrane and the circulation circuit is installed: pumps that move the water between the two zones to keep it oxygenated and in continuous motion.
In typical residential projects, the construction period can be around five weeksIt is always conditioned by size, climate, and finishes. It is an agile process when planned in detail.
Regarding the budget, the initial investment is usually higher than for a traditional pool because the total area usually doubles (bath + regeneration). Even so, the expense on chemical products disappears and maintenance changes in nature, so in the medium term the cost of use can be very competitive.
Realistic maintenance: less chemicals, more garden
Caring for a natural pool is similar to caring for a water gardenIt's not about adding products, but about maintaining the plants and the system in good condition.
- Pruning: twice a year to remove dead flowers and stems and guide growth.
- Vacuuming of the bottomDepending on usage; some people do it weekly to avoid sediment buildup.
- Deep cleaning: at least once a year, preferably in spring, to prepare for the season and minimize unwanted algae.
- Reviews: Periodically check pumps and circulation to ensure system efficiency.
Today there are robots specifically designed for natural pools which greatly facilitate fund maintenance and improve the user experience throughout the year.
If the biological balance is respected and the plants are at their peak, the system works like clockwork: less repetitive work, more enjoyment of the surroundings and the bath.
Frequently asked questions
Can they be climate-controlled?
Yes. The achievable temperature will depend on the weather and the season, but these pools usually feel warm. more temperate than chemical onesThe regeneration zone is shallow and acts as a passive solar collector.
Do they attract mosquitoes and insects?
No. The water stays in constant movement Mosquitoes thrive in stagnant water. The larvae that reach the surface are carried by the current towards the biofilter, thus keeping the pool free of them.
Do they consume less water and energy?
The circulation is optimized for the plant and substrate system, and waste from treatments is reduced. Overall, these are considered more efficient in water and maintenance compared to conventional swimming pools.
Where are they most widespread?
The trend is growing worldwide, with countries like Germany, Austria and the United Kingdom Spain leads in the number of installations. Interest is growing in Spain, although there is still a way to go to catch up with the European leaders.
Are they more expensive than a traditional one?
The project and the regeneration system generally involve a larger initial investment. However, Do not use chlorine or other chemicals And with maintenance that prioritizes plant care, the balance is restored over time.
Design keys to success
Before defining the final shape, consider how you will use the structure: will swimming or contemplation be the primary purpose? This answer helps to determine the scale of the bathing area and regeneration area, already choosing finishes and transitions with the garden.
- Analyze the filling water to select plants compatible with your pH and minerals.
- Plant native species whenever possible; they function as a community and improve the stability of the ecosystem.
- Design differentiated depths that benefit both the plants and recreational use.
- Plan the traffic: efficient pumps and water flow paths that avoid dead zones.
Finally, aesthetics matter. Stone or wooden edges, organic shapes, and carefully chosen vegetation create that particular lake feel that makes these so special. ecological swimming pools.
We must keep in mind that they are a beautiful and natural alternative to conventional swimming pools: chlorine-free, healthy, biodiverse, and efficient. Biological pools definitely represent the future of home bathing areas.
