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Water treated by artificial ecosystems

In systems with near-natural recycled recreational water like natural swimming ponds, natural swimming pools and natural pools, the water is treated exclusively by means of biological and mechanical means to achieve and sustain the desired biological quality. There are small private installations of approximately 50 square meters size to large public swimming ponds, with up to 3,000 bathers per day and best water quality. All have in common its living natural water which does not burn the eyes nor dries out the skin.
Because no chemicals are used for water treatment, the water of a swimming ponds is never a danger to the environment and - as experience has shown - even hygienically no risk.
Across Europe, the number of swimming ponds is estimated at around 16,500 (as of 2009), where Germany and Austria have with 140 and 30 respectively the highest numbers of public facilities of this type. In South Tyrol (Italy) there are currently already five. The growth rates are very high throughout Europe. In Germany alone, every year 10 new natural pools formed at community level, in Austria it is as 5. There are now almost everywhere in the world. They are existing, for example, as well in Australia and New Zealand and the United States.