Mostly just controlling valves and pumps. I have a dutch bucket system with peristaltic pumps pumping nutrients and pH up/down into a reservoir from which water

Mostly just controlling valves and pumps. I have a dutch bucket system with peristaltic pumps pumping nutrients and pH up/down into a reservoir from which water is pumped to the buckets. An additional nutrient film setup runs on its own with the occasional top up. Indoors I just have relays controlling lighting and air pumps for a deep water culture system.