Introducing True Water™, which brings the revolutionary power of nanobubble technology to home spas— the same clean water technology used by NASA spacecraft. Inspired by nanobubbles produced in nature by crashing waves and waterfalls, True Water releases trillions of oxygen-filled nanobubbles—5,000 times smaller than a grain of sand. They remain in the water for days, oxygenating the water to remove 99.9% of bacteria and viruses and deep clean every part of your spa.