Abstract: A holder (4) for retaining an aerator conduit (5) for placement on the bottom (6) of an aquarium tank (1). The holder has a trough with at least one side wall (11a,b) and a retaining means, such as channel (12), in the trough. The holder may be supported in an upright position on the bottom of the aquarium tank by sand and gravel pressing against the outside surface of its side walls. Side walls further keep sand and gravel from covering the aerator conduit. A stabilizer base (14) may be provided on the bottom of the holder. The aerator holder provides for more evenly distributed air bubbles (2) in the aquarium and thus better oxygenation of the water for the fish contained therein. Preferably the holder is made of clear plastic so that it is virtually invisible to an observer, thereby providing an overall more aesthetic appearance for the aquarium.