The pool water flows into the channel perimeter and this is poured into a tank called "bath fee". From here is then sucked by the installation of filtration and subsequently shipped to the pool. Water quality is so much higher than in a skimmer system, because the layer of water more polluted than the surface, is constantly purified by organic residues. Furthermore, the effect of "mirror" that it yields is visually stunning and the pool seems to be broader.