Abstract: An improvement made in components of submersible motor for aquarium is provided for improving oxygen content of output water from a submersible motor and for assembling components in a relatively easier way. For realizing abovesaid functions, an air inlet of an water-guiding chamber of this invention is disposed near a trail end of a blade, so that the air sucked is stirred by a plurality of end edges of the blade and dissolved in the water, and moreover, a protruded ferrule is provided to a magnetic pivot for fixedly snapping to combine with the blade for convenient assembling. Besides, a control valve is also provided for stepless flow rate adjustment in order to control water volume entering the water-guiding chamber, and the conventional measure for combining a cover with the water-guiding chamber is revised by employing an inserting tongue piece and a snapping barb instead to promote application efficacy and assembling convenience.