Protect your spa surfaces from staining with Sirona™ Specialties Prevent, a highly concentrated formula designed to prevent iron and other metal build-up. This sequestering agent effectively prevents iron, copper, and other mineral stains from forming on spa surfaces, ensuring a truly beautiful experience. Compatible with chlorine and bromine sanitizers, Sirona™ Specialties Prevent is added at start-up, with each bottle treating up to 500 gallons of spa water for clean, worry-free results. Pairing it with Sirona™ Defend can further prevent scale formation in spa and hot tub water. Key Benefits: Prevents iron and metal build-up from staining spa surfaces Compatible with chlorine and bromine sanitizers Each bottle treats up to 500 gallons of spa water Pairs with Sirona™ Defend to prevent scale formation To use, add the entire bottle evenly around the edge of the spa during start-up. Once the spa is full, run the filter for at least 30 minutes. For optimal results, pair with Sirona™ Defend to prevent scale formation in spa and hot tub water.