Want to do a high-gravity stout, but have a water PH question

[andycr]

I would like to do a high gravity (~1.075) stout for the holiday season. However, I'm not sure that my mash PH will be right. Due to my setup constraints I'll have to do a partial mash, so there will be far more roasted grains than there will be base malt percentage wise until I add the extract after the mash. Will that throw off the mash PH? If so, how do I fix it? I have the full compliment of brewing salts, but I don't know how to use them.

Thanks!

 

[Denny]

Get Bru'nwater, input your current water, and go from there.

https://sites.google.com/site/brunwater/