I used my Raspberry Pi 3 B+ to control all Fish tank equipments remotely. We live in a city (Chennai, India) and my family usually goes to our native for 2 months every year during summer vacation. During these times, it find it very difficult to manage the equipments.

The Raspberry Pi controls 2 Lights, 2 Filter pumps, Cooler, Fish feeder, and CO2 cylinder. Am planning to attach a camera and some sensors to the system as well.

Right now, all these components are controlled by simple scheduling, but am planning to extend the control through a server in future.

The Pi is connected to a 8-Relay board and is attached to a extension power board. So this setup can control just any equipment.

Source Code: https://github.com/codetiger/AquariumControl