Hi Guys,
I'm working on my first ever AG stout and looking over a few recipes they say to add gypsum.
Now I know the answer to water chemistry is usually "don't unless you know what sort of water you have", but I have a suspicion that my water is soft because I have been having a lot more success with the lighter coloured beers.
So do I give it a go, and if so how much would I use that would be a safe amount if I'm completely wrong?