Just read this awesome blogpost by Bunnie Huang about his DIY hydroponics setup. bunniestudios.com/blog/?p=6481 It's mostly focused on the nutrient solution (and is the best write up about that I've ever come across, practical and scientific at once), but also shows how dead-simple a setup can be. No microcontrollers, no growlights, no IoT nonsense, just two tubs, two pumps, and two float switches. 🌱