Calcium-based algae nutrient supplements for use in aquariums; Chemical analysis kit for testing swimming pool water; Chemical aquarium water conditioners; Chemical preparations for testing swimming pool water; Chemical reagents for non-medical purposes; Chemical reagents, other than for medical or veterinary purposes; Chemical test paper; Chemicals for use in aquariums; Chemicals for use in purifying water; pH value measurement indicators made of paper; Reagent bearing test strips for testin...