I was watching a You Tube video from Home Brewers Outpost where he explains that you can take a small amount of beer (enough to get a reading in the test cylindar) out of the primary just after pitching your yeast, and keeping it in a bottle for future gravity checks. This way you don't have to open the primary during fermintation. Oh, and you need to put a paper towel in the bottle and keep it in the same environment as the pale.
Will this give an accurate gravity reading for the beer that is in the primary?
Will this give an accurate gravity reading for the beer that is in the primary?