Use CUTRINE-PLUS Granular to easily control bottom algae or algae growing within 3 feet of the bottom. Small size granules settle on algae and immediately begin attacking growth. Ideal for use on Chara. Makes early season spot treatment of Filamentous Algae a snap! Early treatment will help prevent the formation of heavy surface mats. Water treated with CUTRINE-PLUS Granular has no water use restrictions.