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This may sound like a very silly question but I just wanted to check with anyone using the formal Aptamil if it is 1 scoop of powder per ounce of water? On the carton is gives you advice for a full feed of 7 ounces but I wanted to reduce my daughters feed to 5 oz so just wanted to double check I would only use 5 scoops of powder to make up a 5 ounce bottle?