Water tank¶
The water used to water the plants must be stored locally in a water tank. The pumps used to water the plants must be lowered into this tank. The static pressure above pumps has an impact on the accuracy of their calibrated output when watering. For this reason, try to source a shallow and wide tank.
The volume of the tank is dependent on how often it should be refilled. 5 liters is a good starting point.