extreme ice chest mlt with 5 row copper manifold

[scotchpine]

+1 A temp change in that direction should only result in a lower FG, not the OG reading, if I'm understanding this right.

[BrewerAdam]

I believe (and I could be wrong) you can get a full conversion at the 144 range, but it just takes longer. The op probably wasnt doing an iodine test to see if it was done converting.

[foomench]

Besides the alpha vs. beta issue and mash time, if you're only mashing out in the 140 range, you aren't going to get as much sugar dissolved into the water. And then if you try for 168 and you're only getting 160, same problem. My efficiencies went from 68-70 range to 75+% when I switched to a HERMS where I could effectively get my cooler mash tun to 168.