I'm wondering how to address the Sparge Water Acidification page and any other tips you may have to offer.

Many here who use BIAB do not have a need for any type of sparge, as it is already built into the process when using the full volume in the mash (provided you can fit it all in your system).

If you actually could benefit from a sparge, I wouldn't mind seeing a tutorial on filling out that section when you get it figured out. That is the only section of brun'water that I have not used.

Rick, 
I also use full volume mash and no sparge. I didn't know if the the sparging section of Bru'n Water could be ignored without changing the entire report.
Martin Brungard said to enter actual full mash water volume and zero for sparge volume. That seems simple enough.