LeisureTime Spa-Metal Gon 16oz P/N: D Easy to apply, this concentrated formula prevents iron and other metals from building up in your spa. Use with each refill to quickly neutralize metals in your spa and prevent unsightly stains. Features: Prevents iron and other metal buildup from staining spa finish One time application - good until next refill 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. Using Defender each week will control metals after the application of Metal Gon at start-up. Compatible With: Chlorine, bromine and biguanide sanitizers. Due to the nature of this product it can not be shipped. In-store pick-up ONLY. For more information, please visit this products webpage.