1. Go to Setting in Plant Nanny²
2. Click "Daily Goal"
3. Select "Customize" to set your daily goal of water consumption!
Note 1: There are some limits according to the unit of water volume - For ml the minimum is at 600ml and maximum at 7000ml, for oz the minimum is at 20oz and the maximum at 237oz.
Note2: Customizing Daily Goal is one of the functions of Daily Hydration subscription plan. If Principal has not yet subscriped, this article might be helpful: (How do I purchase subscription plans?).