My baby is 27 days old and we give him Nan Pro 1 formula. Earlier, I used boiled and cooled down to warm temperature RO water to prepare formula. Recently, I got my RO serviced so the alkaline filter was also installed. I noticed increased colic issues with my baby after that. I researched and found that alkaline water should not be used for formula mix instead use RO water or Tap water. I am confused now. Should I start direct Tap water (comes direct from ground and stored in tanks- TDS: 300) or use RO water but without Alkaline filter? In any case I boil it properly and reuse throughout the day by bringing to warm temperature. Please guide me.