Can I get rid of algae?
Green algae is a common swimming pool problem, which may appear as a greenish growth on the floor and walls of a swimming pool, a green tint to the pool water, or greenish material suspended in the pool water. The only swimming pool chemical that will kill an algae growth is chlorine based swimming pool "shock". Shock is a granular form of highly concentrated chlorine, which quickly raises the chlorine level of the swimming pool water. The elevated chlorine level makes the pool water conditions unlivable for anything organic, and algae quickly dies.