Hello all, I made my third variation of the zombie dust clone this weekend, and ran into some issues. I brew all grain, and have a water filtration system, a barley crusher, and use a 10 gal cooler as a mash tun.
First, the grains were all about 3 months old, sealed in buckets, no bugs or anything in the buckets, so LHBS said I would be good to go. I warmed my mash tun like usual, and when I added my strike water, my mash temp was about 158 for almost 20 minutes. When I finally checked I freaked out, and got the temp down to 145-146, and let it sit for another 40 minutes, and started circulating after 20.
After that everything else went smooth as usual, but I did end up adding my leftover DME from starters to bump up gravity. Even with that addition, I only hit 66% efficiency. I have never been that low, and I never had to add DME to bump my gravity, unless I wanted to.
Could I have messed up with the high mash temp in the beginning? Did cooling it down not help since I already maintained a higher temp for so long? Sorry for the long write up, just couldn't fit it in less words!