Monitoring and Controlling System of Koki Goldfish Aquarium Water Temperature Using Telegram Application

Koki goldfish is a type of freshwater fish that has a beautiful pattern and cute shape, so many people want to keep it. The growth of koki goldfish is influenced by environmental factors, one of them is temperature. This fish can not survive in cold areas, because it has an optimum temperature between 22°C - 27°C. Therefore in maintaining koki goldfish in cold areas, an automatic temperature controlling system and monitoring of the aquarium is needed. So that the water temperature remains optimum and the koki goldfish aquarium water can be monitored. Heater is used for temperature stabilizer, LCD and Telegram is used for monitoring. LCD is used for close range monitoring, while Telegram is used for long range one. From the results of testing the temperature sensor used, an average error of 3.60% was obtained. In stabilizing water, it takes 17 minutes from the initial test temperature of 16°C using 2000 mL of water.