Okay, this is a very stupid question I am sure. But I brewed my second batch yesterday, a nice Anchor Christmas clone with a little of my own spices as well. My first batch I forgot to read the gravity. So yesterday I remembered to read the gravity and OG came out at 1.05. My question is this though: How much do you fill the tube with wort to read the gravity? I mean do you fill it half full, 3/4 full or what? Because it seems to me that the more or less you fill it obviously the readings would change. So not really sure if my gravity is correct or not as I filled the reading tube about half full, then took the reading.