'Pool Pills' is an algaecide and disinfectant. Its Federal EPA registration number is: 4206-6. It was originally approved by EPA on 24 Sep 1964. Its registration got cancelled on 10 Oct 1989. It has a 'Caution' signal word. It has the following active ingredients: Trichloro-s-triazinetrione. 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 algae and slime-forming bacteria.