OK, gave my first AG brew a go yesterday. Coopers Pale Ale clone, 11.5L batch.
I was just using a blender to crush the grain. I had a polyester BIAB bag from ESB, but I was worried that too fine a grind might just fall through the bag. How does this bag compare with a swiss voile? Are the holes too big or are they just right?
I happened to be doing this as AHB was offline yesterday morning... so I decided just to wing it.
I tried not to run the grain through the blender for too long, so that I didn't end up with dust. All the while hoping that it was ground just enough to get the sugars happening!
The top centre bit is more dust than the rest, this was the small amount of wheat and crystal malt, which I ground a little finer than the pils.
Anyhoo after the mash was complete, I found two things:
1. Very little dust had escaped the bag, and
2. The SG was a little lower than I'd hoped. (accounting for temperature)
So, correct me if I'm wrong here, but next time I should grind a bit finer, and this would give me better efficiency?
To bring up the SG I just added a bit of cane sugar, as the original CPA recipe called for this anyway.
Pitched late last night, now the wait begins!