The system has two 140 gallon fish tanks and three 4×8 grow beds filled with grow stones. The beds water flow control is metered with Arduinos with data from Adafruit flow sensors on each bed. The important part is the bed water control, that is controlled by Art Controllers. We have almost 100 fat Talipia fish to fertilize the plants. The room is red because of all the high power LED grow lights.

The grow beds fill until a float switch trips the Art Controller that then opens a big 24 V solenoid valve draining the grow beds to a sump that pumps the cleaned water back to the fish tanks. The controller lets me program how long the beds stay drained so the plant roots get some O₂ and not rot.