Sequesters iron, copper and other minerals and prevents staining of spa surfaces. It is highly concentrated and only needs to be added upon start-up.
Applications: Start-Up: 1. Turn off ALL equipment. 2. Pour entire bottle contents evenly around spa edge. 3. Run filter for at least 30 minutes.
Tips: The best time to treat for metals is when you first fill the spa or drain and refill the unit.