ClearZone is D1’s patented, oxygen-based system used in the @home Collection. This system utilizes UV-generated ozone to kill and oxidize any impurities in the water and circulates the water 2.5 more times per day than the average spa, filtering 7-8 gallons per minute. A silent circulation pump continually filters and circulates the water 24/7 so you’re always stepping into fresh water. An ozone system means cleaner and clearer water, less consumption of chlorine and a more stable system that is easier to maintain. It also cleans during the most important time—while you’re in it.