Our water comes into the house softened so I have no choice. I have a Brita filter but still, depending on the style I'm brewing buy RO water from Walmart or Copps for 0.37 a gallon and dilute 1:1 up to 3:1.
Then add calcium sulphate or calcium chloride or both for IPAs along with sour malt for PH. Read the Primer on this forum. Pretty good and makes sense.
Grinders Island Brewery - Pipeline
145 batches and counting
West Coast Blaster #4 almost go and on tap and a Dbl Chocolate Stout aging/carbing. Brewing East India Porter #4