Cutrine-Plus Granular - Highly Effective Algaecide 

Cutrine-Plus Granular 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 Weedtrine-D or Harvester Liquid.More - http://www.killlakeweeds.com/products/cutrine-plus-granular