Water to feel

All pools have got water filter systems to take out leaves, dirt or other rough-textured impurity of the water. The pool water flows off through a spillway or a drain. Like this, floating pieces (hair, leaves, somatic cells, pollen etc) get sucked off. From there, the water flows through pipes to the filter. In there the water passes several filter layers and comes back cleaned and - if wanted - mixed with chlorine to the pool. The size of the filter system depends of the volumetric capacity of the pool. The most efficient system for the Canary Islands is probably the sand filter. It is the best one managing the conditions of weather and climate.