'Alga-klear' is an algaecide. Its Federal EPA registration number is: 56210-1. It was originally approved by EPA on 30 Oct 1986. Its registration got cancelled on 22 Jan 1991. It has a 'Danger' signal word. It has the following active ingredients: Alkyl* dimethyl benzyl ammonium chloride *(58%C14, 28%C16, 14%C12). It's approved for 1 sites including swimming pool water. It is also approved for 2 pests and pest groups including but not limited to chlorella and phormidium.