I work with zerotol on a weekly basis. Great product. We also use 55% hydrogen peroxide. The difference is zerotol is more stable and does not break down as fast. We use zerotol for direct plant applications and peroxide for water treatment in holding tanks. We store approx. 50,000 gals at all times. Absolute caution needs to be considered. This product undiluted will burn you. Wear proper ppe.