In ubiquitous computing real world objects communicate with each other and act intelligently. Internet of Things is an emerging technology which realizes this ubiquitous nature of computing. Our paper proposesarchitecture for aquarium management using this technology. Aquarium management needs timely gathering of water parameter value changes. These changes may affect the life of aquatic animals in the aquarium. The proposed system collects the real time data from aquarium environment using sensors, processes it and applies the changes to the water in response of any unfavorable situations through actuators.It will reduce the manual effort required in large aquariums by automating the aquarium management process. Testing of the proposed system was done in a small scale aquarium and the notification was send to the user