Fresh water aquaculture is the most cultured fish by fishery farmers with its success is determined by several factors, one of which is the water quality in accordance with the levels required that oxygen content in water is greater than 3, 5 ppm and pH content of water in the pool range from 7.8 to 8.0.Microcontroller technology development is very fast. Electronic devices have been requirement to meet in supporting daily life activities. Most fish ponds are now using manual tools using water

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... umps. This is less efficient and effective for fish ponds. This research focuses to make automation of fish culture water pond circulation with pH control device. ATMega 328P integrated with Arduino and Analog sensor of pH meter is used as control device.Keywords: fish farming, pH control, microcontroller, arduino