Powerful non-chlorine, liquid shock formulated to break down oils, lotions and other organic materials. Specifically designed to be used with leisure time free system with boost and control. Contains 7-1/2-percent hydrogen peroxide. Compatible with the leisure time simple spa care specialty line of products. Start-up instructions: add 3 ounces of boost per 150 gallons of spa water. BE sure to wipe with a clean, damp cloth any excess product that drips down the side of the bottle. 2) circulate water for a minimum of 15 minutes. Routine maintenance: 1) once a week, add 1-1/2 - 3 ounces (depending on spa usage) of boost per 150 gallons of spa water. 2) circulate water for a minimum of 15 minutes. Tips: always allow product to circulate in water for 15 minutes with jets on prior to adding another product. Advantage: boost improves filtration while keeping water clean and clear. Compatible with: all leisure time Sanitizing systems including the free biguanide system.