I just recently corrected some puckery Frontenac.
It was pH 2.9, TA 9.5, 19 Bx after crushing.
Made a simple syrup in 1/2 gal spring water to take it up to 1.096 SG.
Treated 1/3 the must with Calcium Carbonate and recombined.
Must after treatment- SG 1.096, TA 7, pH 3.4
Fermented it on RC 212 to...