It represents the maximum mixture of mist vs chamber volume, the idea is to suspend the roots in a constant aeroponic environment you create and control. To deliver more liquid you would increase the number of cycles by reducing the interval between mistings, you dont want to exceed the 1ml/100L per misting… Heres an idea of the environment created by 0.6ml/100L, 40% below the upper limit.
It doesnt matter if one plant has more root mass than another, they can take what they need from the environment you create and maintain. Large and small rootmasses in a pot of compost is similar, you water to provide the ideal level of moisture,individual rootmases dont count. In aero, the mist environment is effectively the compost, water and everything all rolled into one