I always use RO water to brew. I have never checked mash PH but have become concerned since my brews have come out darker than predicted by BrewSmith. I thought (I read in How to Brew by Palmer) ...
I normally do a single mash so I only take one ph reading and adjust the ph with some lactic acid to get within my target range. now I want to do a brew with step mashing where I need to add hot water ...