By launching a search on the internet we can identify many names for the Natural Pool: Ecological Pool, Biological Pool, Classic Pool, Pond, Basin Aquatic, and there are others …
All these terms group very different realities and this soft focus does not help the laypersons. To the contrary, these inaccuracies would tend to confuse them.
Indeed, a pool is often called “natural” without really a precise and indisputable definition is given; more precisely, without anyone knowing what this qualifier comes from: design? construction? Filtration? water treatment? the absence of any technique? …and many more!
You can see swimming pools that look like natural pools and are not natural pools that want to look like classic pools! It is really confusing.
How to design a natural pool
When talking about a “natural” swimming pool, an idea of form immediately comes to mind. It is a free form, with softened contours and immediately reminiscent of a pond, a lake or a lagoon. It seems inconceivable to consider a natural pool of rectangular shape. But, beware, the form must follow certain rules, to avoid dead zones, conducive to the development of algae and bacteria.
Special care will also be taken around the surroundings of a natural pond. The borders will be forgotten, preferring informal edges, even sloping, largely using rocks, grass or mixtures of gravel, pebbles and resins.
Of course, we will also miss the beaches covered with stones or tiles. We will prefer a material such as wood, and, why not, we will dispense with beach. Have the ponds and lakes been landscaped by nature or by the hand of man?
Finally, the chosen location is of great importance; placing a natural pool in a too sunny zone is a heresy. Indeed, solar radiation promotes the proliferation of algae.
The construction of the natural pool
Beyond design, construction techniques play a very important role in the qualification of natural pools.
The structure itself is made with more ecological materials. For example, some systems do not use concrete or masonry, but use directly as a “structure” soil excavation in the ground with sealing by EPDM or other membranes. This membrane can be left bare, but it can also be covered either with wood (photo source “Modern Pool”, below left) or any other coating materials, such as the application of several layers of quartz / non-resins. toxic on structural grids (photo source “Biodesign” pool below right).
The coatings are generally based on sand, pebbles … mixed with resins and to be aesthetic and anti-slip. Such basins will also eliminate edges with traditional edge and opt for so-called “natural” edges. (Creative Water Design photo below) We will of course eliminate the tile, whatever its color!
The profile of the walls also comes into play. For example, some builders emphasise their construction with gently sloping walls, emphasising the “natural” appearance of their basins to lakes and thus promoting safer access and faster warming of the water ( see photo of construction site Arena pools, below)
Last funny remark: It is particularly recommended for a “natural” pool (internet source: the basics of the construction of a natural pool) to create “vertical” walls to “avoid the deposit and accumulation of unsightly waste on the slopes which makes them slippery as well as limiting evaporation. “A flat bottom for efficient use of a robot is also advocated ?!
The term “natural pool” seems to us a little overused and everyone understands what he wants. The main thing is that the customer is happy with the result. If you wish to engage in such a project, you must have a perfectly clear idea of your design of the natural pool. It is obvious, however, that construction techniques alone do not qualify a swimming pool as “natural”. The filtration system and the water treatment play a vital role!
This is an article of popularisation to help you realise that the term “natural pool” is a large catch-all in which everyone puts what he wants. The fact remains that the purpose of companies is to sell their structure, their equipment or their patent. Like everything that enters the box “biological or natural” the cost is higher. If you have such a project and you have trouble seeing it clearly, contact us; we do not sell materials or structures, … but we offer ideas and advice.
If you have built a natural pool, tell us about your experience!