Check the listing for details. Sirona Spa Care Prevent - 4 Pack. Condition: New. Listed at 51.96 USD. Sirona Spa Care Prevent is a concentrated liquid formula crafted to inhibit metal buildup. Employ this sequestering agent to avert iron, copper, and other mineral stains from developing on spa surfaces. Highly concentrated, it requires only a single application at startup. Product Features: Prevent is compatible with chlorine and bromine sanitizers Prevents iron and metal build-up from staining spa surfaces for a truly beautiful experience Add at start-up Each bottle treats up to 500 gal. of spa water for clean, worry-free results Pair with Sirona Defend to prevent scale formation in spa and hot tub water Sirona Specialties maintain restorative spa water and transform every spa into a soothing sanctuary Directions: One bottle of Sirona Spa Care Prevent will treat spas containing up to 500 gallons As you fill your spa, distribute the entire bottle of Sirona Spa Care Prevent uniformly around the spa's edge Once full, operate the filter for a minimum of 30 minutes. Remember to include Sirona Spa Care Defender in your weekly spa care routine