I've read that reds need to be 3.5 to 4.5 on the pH scale (some debate the 4+ but they're out there) and whites 3.0 - 3.5.
I just measured my Cabernet's acidity at 9g/litre and I'm wondering if it should be corrected. I have added 18 oz of blackberries, 10oz Zantes currants, and 2 cups medium...