GreenClean Pro Granular Algaecide, 50 lbs GreenCleanPRO Granular Algaecide is a fast-acting irrigation water treatment tool that is an integral part in proper irrigation system maintenance. Utilizing BioSafe Systems patented activated peroxygen chemistry, GreenCleanPRO treats a broad spectrum of algae types, including filamentous and planktonic blue-green algae. Due to its unique APC technology, GreenCleanPROs powerful oxidation reaction provides additional efficacy against general bacterial and fungal pathogens in the water column, including but not limited to bacterial coliforms. GreenCleanPRO kills and suppresses algae, reduces pathogenic organisms and is proven safe for all crops.