Please do not add more water when you use less scoop of milk.
"When your baby directly feeds from your breast, the milk he receives is perfectly balanced for his needs at that moment. The rich balance of nutrients, immune factors, fats and fluids is biologically produced without you having to do a thing. That same balance needs to be maintained when you bottle feed your baby – it’s vital to their wellbeing. " - See more at: http://www.bellybelly.com.au/baby/why-you-must-never-add-water-to-breastmilk-or-formula/
Read more