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Internet Of Things (IoT) is a technology that use internet network that allow control and communication between several objects. This paper has designed an IoT system to control and monitoring fish feeding, clarity and water levels in aquarium. The IoT module uses ESP8266. The purpose of this Final Project is to design an IoT system to control fish feeding automatically and manually through the Blynk application, with the amount of automatic feeding every 3 hours by 9 grams which has a maximum delay of 0.9s with an average delay of 0.66s, whereas for manuals there are two choices for the amount of food expenditure, namely 5 grams and 11 grams which have a maximum delay of 1.17s with an average delay of 0.75s. This system can also read the condition of the availability of the amount of feed with a maximum error reading weight of 36 grams and an accuracy of 94%. Reading the condition of water clarity, and water level in the aquarium, Reading the condition of water clarity have an accuracy of 70%, and the height of the water in the aquarium has an average error value of 0,13cm and an accuracy of 87%.