<![CDATA[In fish breeding activities, water quality is a very crucial factor. Water parameters such as temperature, pH, conductivity for the survival of fish seeds. Conductivity is the value of water's ability to conduct electric current. The results measured are, temperature 25°C-35°C and pH 7.5-8.3. For fish cultivation, good water quality is the main key to the success of fish seeds. If the temperature and water tank containing fish exceeds 35°C, it means the water temperature in the tank has been declared hot, and that is certainly not good for the health of the fish so the water pump in the tank must be on to circulate the water temperature in the tank. Then if the pH in the tank exceeds 8.3, it means the water condition is not good for the health of the fish so the pump is on to drain the water in the tank and refill it when it is stable with this water quality control system, users are more facilitated to monitor the temperature and pH in the water quality control system more easily and efficiently. Keywords: Design and Construction. Single Phase Motor]]>
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