CC074-25 Size: 25 lbs Features: -Used to treat, control and prevent a broad spectrum of algae.-Direct application chemical algae remover.-Permissible to be used without interruption.-EPA Registered.-Made in the USA. Color/Finish: -Effects of treatment are immediately apparent - bubbling, bleaching/discoloration of algae. Specifications: -Application Rate: For light algae growth use 1/4 Cup per 50 Square feet of area; For heavy algae growth use 1/2 Cup per 50 Square feet of area.