I agree with stevie... that's a lot of acid for such a small amount of water. Are you sure you've adjusted the strength of the acid in Bru'N water correctly? Typically lactic is ~85-88%, but it may come in some other strengths as well. I feel like you should be in the 3ml range, but that's a complete guess. Can you post a screenshot of your Bru'N additions sheet? Also, how much, and what kind of, base grain are you using?