Development of monitoring and control system of water quality for grow-out tank/ Kim Carlo Costa, Jan Drake Cyrus M. Cruz, Marcelo B. Esguerra jr., Justin Hernan A. Gonzaga, Ma. Krisha A. Lafrades, and Miguel Paulo S. Mitra

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Fish farming is one of the great examples of agricultural endeavor that can be done in the city. However, in fish farming, it is expected that some fish will not grow and survive before they are harvested, causing a great loss for the fish farmers. In this research, the high mortality rate urged the researchers to develop a system that controls water quality in the pond. It was found out that water quality affects the fish's mortality rate and want to lower it from its current state by analyzing different parameters such as PH level, temperature, and the clarity of the water (turbidity level) with the use of Arduino sensors. Solenoid valves and servo motors are used for smart feeding and water change. To help improve the quality of the water a biofilter was made. Through the help of developed monitoring and controlling system it was able to successfully increase the fish's natality rate by 87% to 90% by monitoring the water quality with the help of the said Arduino sensors; controlling the pond's water quality by having a biofilter and automatic water change; and by having two samples of T-Test for comparison of two ponds with and without the system. According to the gathered data, maintaining good water quality helps lower the fish's mortality rate. The lower the mortality rate can lead to more efficient fish farming and greater profits for the fish farmers Keywords - mortality rate, water quality, smart feeding and water change, pH sensor,