IoT Design of Ornamental Fish Aquarium Management Could Monitor Water Conditions

The purpose of this research is to produce a design and implementation of a prototype smart system for Ornamental Fish Aquarium management that can monitor water conditions ($\mathbf{p H}$ and water temperature). this research method is a development method by first identifying then conducting a literature study to find out the technology of renewable technology, then designing and modeling the system which is then carried out in the Development process for the components used in this research are ESP32 to send data to the server, Arduino nano to retrieve sensor data, $4502 \mathrm{C} \mathbf{~ p H}$ sensor to retrieve sensor data and DS18b20 Temperature Probe Waterproof Sensor to retrieve water temperature data. After the device is completed, system testing is carried out where testing is carried out to ensure the device runs according to the system flow, so that the data fails and can be concluded. In implementing the prototype of a smart Ornamental Fish Aquarium management system that can monitor water conditions (pH and water temperature) the pH sensor model used in this study is not suitable for continuous use (submerged) in the aquarium.