SeClear G 20 Pound BagSeClear G Algaecide and Water Quality Enhancer provides effective control of surface and bottom algae (including Chara and Nitella) while inactivating phosphorus and enhancing water quality with each application. Because of eutrophication (water body aging), successful management of nuisance algae and improving water quality can be difficult. Other copper based algaecides, such as the old standardcopper sulfate, can control some algae present but does