The salt is an old timer's "trick". Since it's homebrew & probably rather harsh

someone figured out that by adding a pinch of salt occasionally helped. Remember homebrew was rarely good not all that many years ago.
What they didn't figure out is why the salt helped... which wasn't all that often, or they fooled themselves into thinking that it did. That harsh flavor could be from any number of things, most likely hot/uncontrolled fermentation, but maybe hops, water chem, etc. What the salt does is drop the sulphate/chloride ratio & make the water flavor profile a little rounder/less sharp.
Lee
"Show me on this doll where the internet hurt you."
"Every zoo is a petting zoo if you man the fuck up."

BN Army // 13th Mountain Division
