I should add that when I see "Vodka dosing" really what I read is "Carbon dosing". I've used vinegar (acetic acid), vodka (whatever was on hand at the time), and combinations thereof. While there may be some non-listed ingredients, the listed ingredients of NoPoX are ethanol (25%, or 50 proof, so weaker than vodka), acetic acid (3-5%, so equal or slightly diluted compared to white vinegar) and methanol at 2-3%. I suspect there is a valid reason for having a combination of the three, perhaps different bacteria types prefer different sources. Messing around with those ratios would make for an interesting experiment. Perhaps someone with a better biology background can expand on this.