Assays for testing water, other than for medical or veterinary use; Chemical analysis kit for testing swimming pool water; Chemical aquarium water conditioners; Chemical preparations for testing swimming pool water; Chemicals for use in aquaculture; Chemicals for use in aquariums; Chemicals for use in purification of water; Nutritive additive to enhance the biological activity of water, soil, seeds and plants for purposes of fertilization and bioremediation of pollutants; Reagent bearing test...