CUTRINE PLUS 1 GAL, Cutrine-Plus Liquid with copper ethanolamine complexes is a highly effective algaecide. Controls a broad range of algae in lakes, ponds, fish hatcheries, irrigation canals, and drainage ditches. Effective on Hydrilla when combined with Harvester Liquid. Cutrine-Plus Liquid is hard water stable. Far less corrosive than other common algaecides.