Aquarium filters; Aquarium filtration apparatus; Aquarium heaters; Aquarium lights; Water filtration and purification units and replacement cartridges and filters therefor; Water filtration and purification units and replacement cartridges and filters therefor for aquarium filtration; Water filtration apparatus; Water filtration apparatus for the deionization of water; Water filtration bottles sold empty; Water filtration pitchers sold empty; Water purification and filtration apparatus; Water purification, sedimentation and filtration apparatus for clarification, thickening and filtration of water, waste water and industrial water; Water treatment equipment, namely, water filtration units; Water treatment equipment, namely, water filtration units and reverse osmosis units; Water treatment equipment, namely, cartridge filtration units; Water treatment equipment, namely, reverse osmosis filtration units; Filters made of fiber for water filtration; Membrane filtration units for water treatment apparatus; Ultraviolet lamps used for aquariums; Water filtering units for aquariums