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replyOn that note, the easiest way to get your hands on some protease is to buy digestive enzymes sold as food supplements (most often they're made out of dried pork pancreas).
replyYou also don't need much equipment: scales and an immersion circulator should do the trick.
it hasn't updated in a while but i quite like this blog: https://www.culinarycrush.biz/all/will-it-garum
replyI think all you need is salt, fish, and a clay jar?
replyFor fish sauce definitely, assuming you also use the guts so you can get the enzymes. If you want to make with a protein source that doesn't have the enzymes present, like mushrooms, you can add them separately. Whole fish just fills the protein and protease slots with a single ingredient.
replyPlease, for the love of all that is holy, do not make this if you have neighbors.
replyhttps://www.youtube.com/shorts/R1Hq3WEqVeI
The video claims the smell is not "entirely unpleasant" but that's a lie. It is the most disgusting smell I have ever encountered. And I used to have to shovel manure and clean chicken coops growing up. Once I even had to dig a dead racoon out of the guts of a square baler after it got run over and jammed up the machinery and then sat for a few days in the summer heat. Garum smells worse.