I keep seeing a pretty common theme of 1/2 cup of DME to 2 cups of water for a yeast starter. And its a rule of thumb I always followed, and I havent really ever paid attention to much detail beyond that for the starter. My starters have always been ok, but never great.
Well, I upgraded my kit and got a stir plate and a 1L Flask. I did 1 cup of DME to 4 cups of water and ended up right at 1L. I boiled for 15 minutes, cooled and through it in the flask and thats when I noticed that I had a little less than 900mL left, which is 10% boil off. So, knowing that the sweet spot for a yeast starter is 1.035-1.040, I checked the gravity reading and I got 1.055.
So my question becomes, the 1/2 cup DME to 2 cups water, is there corrections that must be made for boil off? I simply topped my starter off with water and got it perfect, but this is the first time I have topped it off with water, so curious if this is common or if I need to adjust my water for boil off.
Well, I upgraded my kit and got a stir plate and a 1L Flask. I did 1 cup of DME to 4 cups of water and ended up right at 1L. I boiled for 15 minutes, cooled and through it in the flask and thats when I noticed that I had a little less than 900mL left, which is 10% boil off. So, knowing that the sweet spot for a yeast starter is 1.035-1.040, I checked the gravity reading and I got 1.055.
So my question becomes, the 1/2 cup DME to 2 cups water, is there corrections that must be made for boil off? I simply topped my starter off with water and got it perfect, but this is the first time I have topped it off with water, so curious if this is common or if I need to adjust my water for boil off.