Eliminator® is a powerful 7%-copper vinyl-liner algaecide that kills and prevents all types of algae growth. One quart treats up to 160,000 gallons! The fast-acting, long-lasting formula will not foam or cloud water. It prevents and kills all common algae growth including stubborn green and black algae, even persistant yellow mustard algae. Great for all pool types and perfect for Spring start-up. Plus you can swim immediately after treatment!