The fundamental mechanism involved in the designing of natural ponds mimics the biodiversity as well as functioning of the natural environment. In the natural swimming ponds, there are separate zones for swimming and purification of water. Though this is the basic idea involved, the design, size and ratios can vary between constructed natural swimming ponds.
The minimum size recommended for natural ponds is 30 to 60 square metre. However, much smaller ponds than this are also known to work quite well once properly maintained. In the total water surface, the swimming zones occupy about 50 to 70%. The remaining is allotted for filtration. The shallow areas are characterized by abundant of plant life and aggregate in a way serving as natural filters. Therefore the water remains clear and pure.
For allowing the plants to thrive in the natural pool, it is essential to maintain the pH levels of the pool between 5.5 and 7. The location and design of a pool are vital aspects that can help save the high maintenance costs associated with the conventional kind of pools.
As a general rule, the larger and deeper the pool, the lesser likely that it attracts algae growth. For a healthy swimming pool, it is essential to allocate a 45 to 50 square metre area. If the pool is deeper, the water is cooler. This will actually mean a slower start to the swimming season. However, under the scorching heat of the summer, swimmers can hope for a more refreshing dip. The ideal condition for a swimming pool is neither too cold nor too hot, but only the right kind of temperature.
The lesser the exposure of the water surface to the sun, the better since sunlight promotes the growth of algae. Floating leaves on the sunny areas can not only slow down the growth of algae, but also protect the aquatic life.