<p><em>Aerator has function to supply the dissolved oxygen in the water is very important for the survival of fish, therefore the</em><br /><em>aerator is required to be on for 24 hours. However, due to depending on PLN electricity, when there is a power outage for a</em><br /><em>long period of time, the aerator can't supply dissolved oxygen into the pond and the oxygen supply in the pond will drop</em><br /><em>drastically. This is dangerous because it can threaten the survival of ornamental fish. Therefore, an energy supply system is</em><br /><em>needed that can supply electrical energy to the aerator to replace the dependency electricity from PLN. This tool is designed</em><br /><em>to use a power supply from solar panels so that it is not affected in the event of a PLN power outage, and can always supply</em><br /><em>dissolved oxygen levels for the survival of ornamental fish. In addition, this tool is also equipped with a monitoring system</em><br /><em>based on the Nodemcu ESP8266 Microcontroller which is displayed via the Thingspeak server. The monitoring system used</em><br /><em>in this tool uses a PH sensor and a temperature sensor. The use of PH sensors and temperature sensors because the level of</em><br /><em>acidity (PH) and temperature are one of the parameters of water quality other than dissolved oxygen. When the aerator is on,</em><br /><em>the information on the pool water will be read through the PH sensor and temperature sensor.</em></p>