I am planning on brewing the Stone Russian Imperial Stout this weekend and have been planning it for a while. I am using the WLP002 yeast that I just finished with on my previous batch. I washed it and left if in the fridge overnight, decanted the liquid off the top and let it warm up to room temp. I created a starter last night and pitched the washed yeast last night.
My question today is that I am wondering if I should be using a different yest, the recipe says that the gravity will go from 1.096 to 1.020, but you not going to get to that using WLP002 as it averages 66.5% attenuation.
I am expecting my batch to be at 1.101 and finish at 1.032 with a 3000ml starter using WLP002.
I am wondering how I can get that final gravity down a bit more. Could I hold some fresh yeast off to the side and pitch it as fermentation starts to slow down or should I pitch some WLP005 in addition to the WLP002, which I also have in the fridge?
I am already going to mash at 149-150 to maximize the sugars potential.
Anyways, what do I do?