Water help

[NewJersey]

So, I'm trying to brew the "generic west coast IPA" from this months byo. I brew biab and need to treat 9 gallons of RO water.
What and when do I add it?
14lbs of pilsner (what I have on hand)
1.75 lbs of crystal

 

[Sunfire96]

Have you tried using Brewer's Friend? It's free software with a water calculator that tells you exactly how much of each salt is needed for your goal

 

[mabrungard]

Having sufficient sulfate in the treated water is a hallmark of a west coast IPA. The exact level of sulfate is often a personal preference. I like bringing sulfate to around 300 ppm, but it's not for everyone. However, I do recommend that you add at least 100 ppm sulfate in order to get you in the ballpark. Be careful when adding a lot of calcium salts to RO water since that can result in the pH of the mash falling lower than desirable. I recommend you read the Water Knowledge page on the Bru'n Water site to understand what you're doing with water additions and why you're doing it.