Control algae in your pond or lake with Cutrine-Plus, available at Eagle Hardware Farm and Ranch. Cutrine-Plus liquid is a very fast acting, contact algaecide. It works extremely well controlling a broad range of algae in ponds and lakes. Cutrine-Plus Liquid begins to work immediately on contact to break down the algae. It will break down the cellular structure of the algae and interrupt it’s ability to photosynthesize food. You will see control of Planktonic Algae in 24-48 hours.