Jack’s Magic Quart The Magenta Stuff Sequestrant For use in all pools to prevent and help remove stain and scale; will not add phosphates Jack’s Magic The Magenta Stuff is the most advanced start up and stain-fighting product available for a stain-free pool. The Magenta Stuff is a fast acting and long lasting product that helps remove stains and scale and also protects your pool from staining and scaling. DIRECTIONS: It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Initial Dose: 1 quart per 15,000 gallons Maintenance Dose: 6-8 ounces per 15,000 gallons weekly.