The few freshwater species that exist in Portugal live in streams or flowing rivers, in other words, in conditions that are very different from those of a biological pool. Almost all of them are registered in the Red List, because they are rare and the destruction of their habitat and/or the pollution of streams [...]

The mere fact that amphibians sing, especially frogs, is widely known. Frogs in biological pools are no exception. But why do they sing? The season of most concert activity is obviously spring. For many of the species there is a direct link between water temperature and song intensity. Singing takes a lot of energy [...]

Over the millennia, humanity bathed in natural waters, simply because there was no other. The lower population density living in the landscapes of yore and the absence of contamination allowed this, in some parts of the world until today. Thus, one took a bath without concern. The first “pools” were invented 3,000 years before [...]

The Iberian Group of Natural Bathing Waters (GIABN), a bi-national association of professionals for design and construction of biological pools on the Iberian Peninsula, started a collaboration with other sister organizations in Austria and Italy. Together they launched a research project that aims to try to vanish how and why guests spend their holidays [...]

With spring a new inhabitant arrived at our biological pool. For some time now we have been wondering about cut leaves of aquatic plants floating in the pool, a phenomenon that usually does not happen. And, approaching the pool, someone was making sudden jumps, fleeing from the bank into the depths of the water. [...]