My system is an ebb and flow that cycles on and off throughout various periods of the growing cycle. I would like to keep track of this so I can evaluate yields vs. different lengths of watering time. I use gallons right now and treat the flow as a gallon a minute, and record it that way. This is a workaround that works for me, but it would be great to have more ways to record watering cycles beyond volume units of measurement. For instance, if you were to select the time-based measure, it would allow you to record the number of cycles per hour and the length of each cycle.