I use JMS alot....you really don't need the molasses, and yeast...and unless somethi g changed Cho Youngsang recommends against it. But hey..whatever work for ya.
I do 4 gal.of water, a shovel full of forest humus 15 grams of sea salt ...four or five potatoes amd let it rock. I use 5 gallon paint strainer bags..
I dilute the 4 gallons in 40 gallons of water...no worries. And honestly, unless your water is like public pool water it won't jack up the biology too much.