while I know the difference between too little or too much in my home brew , how to add and subtract it I was asked a question I couldn't answer the other day by a person who only buys store bought beer. As I'm looking at the difference the only thing I can see is the size of the bubbles, store bought beer has bigger co2 bubbles. So I went on a quest to investigate, purchased several six packs from the store and sure enough even the micro brew beer has large bubbles racing up the side, mine of course can barely be seen; but too much and you get that sharp almost bitter burn everyone who kegs has had at one time or another. so the question is how do we get the larger bubbles in our home brew beer ? what are your thoughts ??