I have 8 gallons of muscadine aging, 1 - 5 gallon carboy and 1 - 3 gallon carboy. The 5 gallon seems to be going through MLF, in the last 2 weeks it has started bubbling again. The 3 gallon did not do this, I racked the 3 gallon this morning and it was still very acidic.
Would adding calcium...