Currently, aquatic animal farming is important to the economy of Thailand. especially the cultivation of tilapia Which is the number 1 economic freshwater fish in Thailand, generating a lot of income into the country. From the factors of water quality in tilapia ponds, Especially important to the growth of tilapia is the amount of dissolved oxygen in the water. It is an indicator of the suitability of the life of aquatic animals. A sudden change in weather conditions, such as extremely hot weather for several days in a row. Then there was rain for 2 to 3 days in a row, causing the water temperature in The daily cycles are very different, causing the tilapia to become knocked out of the water, resulting in the death of the tilapia. Using an aerator will help the tilapia in the pond to survive. However, most of the aerators on the market are Power is used from electricity. As a result, the cost of raising tilapia increases if the aerator must be turned on all the time. This thesis therefore presents a solar-powered aerator set controlled by a smartphone application. with notifications It was created to reduce costs by using the principle of water circulation, causing the dissolved oxygen in the pond to increase. The system was created by testing in a tilapia pond. and has solar cells as a source of energy Divide energy to supply to the Arduino UNO R3 microcontroller that has a blinking application to control turning it on and off. You can see the operating situation of the system, such as oxygen values, temperature values, along with notifications. When the value is reached, the system will notify the application on the smartphone. and command the motor to work Or you can order it to turn on and off through the application.