Hello All, I have some Merlot that Has been in carboys for about a year now. It seems to be somewhat fizzy. The taste is good, except for the fizziness, and there are no off odors. The Brix reading is 0, so primary fermentation is done and a rudimentary alcohol reading was about 13%. What is going on and what should my next steps be? Is it MLF? I did not add any yeast to make that happen. Interestingly, we also have the same Merlot aging in a whiskey barrel and this does not exhibit fizziness. Thanks for your help!