Developing Monitoring Sensor for Managing the Water Quality of Aquarium System Using Micro Controller Program

Abstract

Fish survival in an aquarium depends on some important water parameters such as temperature, pH, dissolved oxygen and lighting. This study was conducted to develop a monitoring sensor (micro-controller) for evaluating aquarium water quality parameters. Recirculatory Aquaculture Systems (RAS) gave room for removal of solid wastes; continuous circulation of water provides a conducive habitat for the fish in an aquarium. Water in the aquarium was removed and replenished depending on the alkalinity/acidity of the aquarium’s water, which was measured by pH sensor and shown on liquid crystal display screen. The sensors for temperature and pH of water quality were designed for 24 to 27 ^oC and 6.5 to 8.5, respectively. When the water quality is below or above the range, a signal was sent to the pump to remove the polluted water and replenish with filtered water. The system sensed the quality of polluted water; the water was removed and replenished with fresh water from RAS when pH was adjusted to 2.5 and 13.5 by the addition of H₂SO₄ or NaOH. The sensor in the aquarium reads satisfactorily okay at pH of 7.4 by the addition of distilled water and the pump did not remove water from the aquarium or pump water into the aquarium. The Arduino micro - controller is recommended for monitoring water quality of the aquarium and RAS.