Reddit reviews GLUCOAMYLASE ENZYME SINGLE DOSE PACK 10g PACKET DRY BETA AMYLASE ENZYME

It will start to denature at 149F. What I did was add this stuff to the mash tun after mashing for 20 minutes at 144-146F and then did an hour long rest.

Some people use it in the fermenter, some add it while transferring from mash tun to boil kettle and do a 30 minutes stand (provided you stay under 149F). Adding it to the mash was easy enough and I got good results (1.058 —> 1.000).

You can order ultra ferm from White Labs, or amyloglucosidase/gluco-amylase online or from Amazon, but that won't solve your problem for tomorrow :(