Check the listing for details. BioGuard Scale Inhibitor 32 oz - 2 Pack. Condition: New. Listed at 51.98 USD. High levels of minerals in pool water can cause cloudy water, scale build-up on pool surfaces, plumbing and equipment, resulting in costly repairs, inefficient operation and unsightly water. BioGuard Scale Inhibitor is a liquid product that is specifically formulated to control and prevent scale build-up due to excessive mineral levels. Product Benefits: Eliminates scale build up Liquid sequestering agent Easy to use (no mixing) Works on all types of pools Helps prevent damage to pool surface and equipment Dosage: As an initial treatment, apply 1 quart per 10,000 gallons to deep end of pool with pump running Circulate 48 hours continually after application Swimming can resume 15 minutes after product addition to pool As a maintenance treatment, use 16 oz. of this product per 10,000 gallons of pool water once a month Maintenance doses should be used for pools in areas where excessive minerals cause extreme and constant problems