We use custom valves, single board computer, water tank, pump with controller and a dozen meters of tubing. Valves are not shown on purpose. All these things w

We use custom valves, single board computer, water tank, pump with controller and a dozen meters of tubing. Valves are not shown on purpose. All these things would fit in a human chest - we have a plastic skeleton next to it. We are working on further minimizing this.