The Internet of Things (IoT) is a ground breaking technological advancement that allows objects to digitally represent themselves. It has brought a new level of automation to various fields, modernizing everything. In addition, IoT is playing a significant role in pisciculture and agriculture including crop monitoring and soil management. In this context, the authors have designed a smart system for monitoring and predicting fish farming conditions based on IoT technology. The system focuses specifically on water quality, using three sensors pH and temperature sensors to determine the pH and temperature values of the water, and a water level sensor to detect the water level. The proposed system displays the relevant information regarding quality of water through a mobile application and predicts the best fish to be farmed based on the water quality.