6-month maintenance of 4-stage filtered refrigerator (PP-CTO)

It consists of a cotton candle made of polypropylene that purifies up to 5 microns as it removes solid impurities such as sand, clay, algae and rust.
The second stage (granular carbon):
Made of thermally activated carbon, its function is to remove dissolved gases and treat water from unwanted substances such as chlorine, taste, smell and color.