Hey, I have a pretty consistent problem using the advanced water calculator. I use IBrew Master on my phone usually when I start a recipe and it gives me a color (SRM). When I put the SRM in on Brewers Friend it comes up with a mash pH for the water that I put in. When I change it to Grain Bill for color calculation, the pH is always about .2 higher than the SRM calculation. Huge difference there. Is it me or had anyone else done this?