naturbad

A naturbad, also known as a natural swimming pond or bio-pool, is a swimming area that uses biological processes to filter and purify the water, rather than chemical treatments like chlorine. These bodies of water are typically divided into two zones: a swimming zone and a regeneration zone. The regeneration zone is heavily planted with aquatic vegetation, which plays a crucial role in filtering out nutrients and impurities from the water. Microorganisms in the soil and on the plant roots also contribute to the purification process.

The design of a naturbad aims to mimic natural ecosystems, creating a habitat for various aquatic plants and sometimes small aquatic animals. The water quality in a naturbad is maintained through a combination of biological filtration, mechanical filtration (often a sand filter), and sometimes a skimmer to remove surface debris. Sunlight also plays a role in the natural processes within the pond.

Naturbäder offer an alternative to traditional swimming pools, appealing to those who prefer a more natural swimming experience and are concerned about the use of chemicals. They can be found in both public and private settings. While they offer a unique aesthetic and environmental benefits, their maintenance requires an understanding of ecological principles. The water clarity and appearance may differ from conventionally treated pools, often having a more natural, sometimes slightly murky, appearance due to the presence of natural organic matter.