A powerful blend of natural enzymes that breaks down oil and lotion that cause unsightly scum lines and odors in spa water. Helps reduce the need for maintenance of filters and spa surfaces. Use weekly as part of the Simple Spa Care Program. Compatible will all types of spa chemicals and will not interfere with spa filters. Initial Treatment: Add 1-ounce per 250 gallons of spa water. Repeat daily until scum line is gone. Weekly Treatment: Add 1-ounce per 250 gallons of spa water weekly to avoid buildup at water line.