Did an experimant this weekend while brewing my all gain stout. I did an iodine test every 10 while mashing to see when conversion took place....30 min is what I got with the maris otter that I used. I use the BIAB method. Just wondered if anybody else has timed their conversion time, and if the thickness of the mash was a contributing factor? It was only around an 8lb grain bill for 5 gal. and mashed at 158?