I remember sanitizing my carboy with about a gallon star sans. Forgot to empty the star sans and started filling the carboy with cooled wort. At the same time wondering why it was foaming over as I'm filling the carboy. Oh **** forgot to empty the star sans. It was a pale ale. Turned out excellent. A bjcp judge said it was a good beer and he didn't notice it had a gallon of star san in it. It is a yeast nutrient.