It appears that this switch to boiling at a pH of about 5.5 and also getting the wort pH lower before using something like whirfloc is helping with my clarity. It's either that the whirfloc is working better at that lower pH or else boiling the wort at the lower pH (which I was doing before) is causing haze. I had a house full of people here yesterday and everyone was drinking my beer. I saw clear glasses of beer everywhere except for one amber lager that I made prior to this switch... it was very hazy. Any thoughts on the clarity impact of this?
I almost always boil at 5.1-5.2 and my beers have a polished clarity. I don't think boil pH has much, if anything, to do with clarity, except maybe in theory. Boiling at a higher pH will definitely cause the wort get darkened more than at a lower pH. I think you entered a rabbit hole.
Edit: It is common for pH to drop during the boil by .05-.1.
Some of this was a simplification of my processes and I am liking the changes and liking the results too. I don't know if it's a rabbit hole or not but I generally want to know the "hows" and "whys" of things. If my results are satisfactory and I don't know the reasons why things changed then I'm okay with that but when things so south (poor clarity, poor head retention, off-flavors) I want to know why so I have a better understanding. All of the recent beers have been clearing very well and have had excellent flavor, head retention, etc. so I am going to try to ride these new processes for awhile. Cheers.
EDIT: I also wondered if mashing at too low of a pH could cause haze issues. When I first used BNW and punched in all my water information, it showed that I needed 4ml of 88% lactic acid to get my mash into the proper range. I am now just getting my source water to a pH of 5.5 prior to mashing and to get to that point I need about 2.75ml of lactic acid. I add the acid, heat the water and take the pH of the mash which is usually around 5.4 which translates to 5.2 at mash temp which I consider to be good. I'm going to continue this way and see how the beers come out. Mash at this pH, boil in the mid-5s, add 1ml lactic acid with about 10 mins left in the boil, add whirfloc.