Milk problem

Is it ok na ang ratio ng milk ni baby is 1:3 (1 scoop per 3oz of water)? May time kasi na nilalabas lang nya yung iniinom nya.. Sabi ng friend namin, baka naoover feed kaya tinabangan namin yung milk (before 1.5:3). Then so far, ok naman si baby. Hindi na nya nilalabas yung milk nya. Similac po yung milk nya. Anyone with same experience? Thank you very much po..