I'm an experienced brewer who now has done about a dozen or so all-grain Brew In A Bag (BIAB) batches with decent results using a known local municipal water source (Columbus, Ohio). To improve things further, I've recently started tracking my target mash pH using Brewer's Friend. I see that I need to try to lower mash pH for most ales that I brew. I purchased lactic acid from my local home brew store (a beer/wine retailer), but it came without instructions on how much to add and how much that will lower pH by. And the staff haven't a clue. Anyway, is there a way to enter lactic acid on Brewer's Friend to calculate my target mash pH? I also have 5 Star Chemicals' Mash Stabilizer 5.2. Anyone have experience with this product? I have experience with adjusting minerals to my water (through gypsum, sodium chloride, etc.) but is this a problem while using the Mash Stabilizer 5.2? I've read some things that suggest Mash Stabilizer may have such "salts" in it already. Anyone have experience with this? Thanks in advance -- I'm getting a bit confused on how best to hit the right pH!