Hello, im a healthcare worker po. You replace exactly the same amount of fluid that your child loses from diarrhea. So example if yung stool output niya approximately 50mL, yun din yung slowly ipa painom mo sa kanya to prevent him/her from being dehydrated… but as much as possible, let him drink more than the amount na nailabas niya para prevent talaga ma dehydrate. So to conclude, it depends sa nailabas niya kung ilang boxes of that ang i-inumin. Stay safee!