Transparent and clean like spring water! But where does it come from? How can it be so clear with all the way it has come?
She fell on the ground and on the dust, on the streets she washed everything she encountered, she brought with her mud and debris; for a while it disappears and then returns as clean and transparent as when it arrived.
When not seen, it infiltrates the ground, into the bed of streams, rivers and canals, crosses gravel and sand and settles in the aquifers, yielding dirt and debris to the ground, gravel and sand as if it were a filter!
So to clean the water, the sand filter is born, like what has always happened in nature. A system as old as water but which always works!
Technology has reproduced the same process by passing the water to be cleaned in a tank full of sand, or rather quartzite.
The use of quartzite sand with a grain size of 0.8 – 1.2 mm is recommended.
