GLB Strike-Out® Algaecide is a triple, chelated 7.4% copper algaecide that is designed to control green and mustard algae. This product is economical, concentrated, and long lasting. It is safe for use in all types of pools. There is no wait time required after use of this product. Strike-Out Algaecide can be used with chlorine, bromine, and ozone sanitizers, as well as salt water pools.