Is chlorinated water "real and natural"? I've taken the steps to baptize all my kids because I believe the water used was not real and natural. Also since my first 5 kids were baptized in the novus ordo I couldn't verify if the baptism was performed correctly.
Matter, form, and intent is all that matters.
Matter: Water looks very different depending upon where you are in the world. I was told that in an extreme emergency spit could be used.
Form: "I baptize thee in the name of the Father, and of the Son, and of the Holy Ghost," while pouring water on the head. The catechism does not say the water must flow, nor does it say the pouring must be done three times. The catechism does say, in case of necessity, water may be poured anywhere on the body, not absolutely requiring the head.
Intent: you can never fully know the intent.
As a bishop recently told me, keep our Faith simple. God is not complicated. He knows our intent. As st. Bonaventure said, "When we pray, the voice of the heart must be heard more than that proceeding from the mouth."