An aquarium filter cartridge including activated carbon or the like and a housing wherein the water traces an S-shaped path is disclosed. In the S-shaped path the water flows horizontally through a floss type filter, downward to the bottom of the housing, horizontally into the bottom of the carbon cartridge, up through the carbon filter, and out the top or upper side of the housing back into the aquarium.

A fastener for the suspension of a birdcage toy or the like has a first end terminating in a first loop, and a second end terminating in a second loop, each of the first and second loops terminating in a free end that allows for easy attachment of objects to the loops. An additional section is defined between the loop free ends to assist in preventing the free ends from deflecting outward, resulting in possible inadvertent detachment from the cage or retained object.

A birdcage watering device is provided with a no-spill valve and method of attachment. The watering device comprises a valve attached to a water chamber comprising an extended leg such that when the watering device is completely assembled the valve may be displaced to fill trough. Particularly, the extended leg of the valve produces an angled opening to permit flow of water from the water chamber without clogging or getting "stuck" in the valve opening. The water chamber is easily removed for refilling and the valve is designed to prevent the spilling of water during the process. A method of attachment is also described that allows the device to be on the outside of the birdcage while being secured from the inside of the cage, thus allowing for easy refilling of the water chamber of the device.

A lightweight perch formed from plastic, wood or the like, has, in one embodiment, an outer surface on which is applied a granular material such as sand or the like. An adhesive or solvent may be used to apply the granular material to the perch. The resultant perch duplicates the healthy, stimulative effects of expensive concrete and sand perches at a tremendously reduced weight and cost. In another embodiment, a perch is formed from a plurality of parts of dissimilar materials that are joined together through the entrainment of one material from one part into the other material from the other part.