I brewed a blonde ale last week. Pre-boil pH was 5.5 and post-boil was 5.4. Is it normal for the pH to not fall much during a boil? If I find my pH to be high, would it be worth it to try to get it into the 5.4-5.5 range? The pre-boil pH for the beer I made for the fauxpils study was 5.7, IIRC. Do you guys have a rule-of-thumb for how much acid to start with, so I don't overshoot? I always have 10% phosphoric and sour, unhopped wort on hand.