(under subclass 245) Subject matter including apparatus providing oxygen enrichment to water in the aquarium.
SEE OR SEARCH THIS CLASS, SUBCLASS:
261, for an aquarium aerator and filter combination.
SEE OR SEARCH CLASS
204, Chemistry: Electrical and Wave Energy, especially
194+, for electrolytic water treatment apparatus.
205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions, especially 742+, for electrolytic treatment of water, sewage, or other waste water.
261, Gas and Liquid Contact Apparatus, appropriate subclasses, especially
122.1+, for a submerged screen through which a gas passes into liquid contained in a receptacle.
