Biochemical reagents used for non-medical purposes; Chemical analysis kit for testing swimming pool water; Chemical aquarium water conditioners; Chemical preparations for testing swimming pool water; Chemicals for the treatment of cooling water systems; Chemicals for the treatment of hot water systems; Chemicals for the treatment of water and wastewater; Chemicals for use in aquariums; Chemicals for use in purification of water; Chemicals for use in purifying water; Chemicals for use in water...