Cutrine-Plus is one of the most popular algaecides on the market today. It is a double-chelated copper solution effective against a wide variety of algal species. Due to its double-chelate it stays in the water column longer, and in combination with its greater amount of activity in the plant can be much more effective. Cutrine-Plus is the only chelated copper algaecide that is patented on the market today! CUTRINE-PLUS Liquid with copper ethanolamine complexes is a rapid acting, hard water stable, contact algaecide. Controls a broad range of algae in lakes, ponds, fish hatcheries, irrigation canals, and drainage ditches. Also effective on Hydrilla, when used in combination with Weedtrine-D Liquid. Read and follow all local, state and federal regulations pertaining to the use and application of these products before ordering. Water treated with CUTRINE-PLUS Liquid has no water use restrictions.