I've got this idea that dropping my ph post boil to 4.5 before pitching lacto in primary, would be a decent way of reducing the risk of contamination during souring week. I couldn't find any suggestions on how much 88% lactic would do the job. My mash and sparge were 5.2 ph, and post boil was 8 gallons of 5.0 ph with a 100% Pilsner no hops, blonde sour. I chilled to 100° whirlpooling, and pulled a sample. Cooled to 70° and it was 5.0 ph. I then took a wild guess and added 15ml of 88% lactic. That brought it down to 4.5 ph on the button.
Just FYI