I am bulk aging a Merlot from a kit, pH=3.4, TA=7. Been aging in a 20 L oak barrel since November 2014. I racked in April, and at that time added 1/4 tsp KBMS. When I put into the barrel, I decided since pH was low to go with an additional 1/8 tsp instead of the 1/4 tsp.
Since then I've...