I doubt that you took a SG when you started, so we don't know where the wine is at right now. You didn't mention adding sugar, so the ABV is likely low...mustang grapes are not very sweet to start with...so, I'm betting you have five gallons of very thin tart grape juice.Tried my mustang grape wine while racking and seems real thin. Any ideas . What can I do to give this more body. Didn't really have enough grapes I think
I'll tell you what I don't like about adding the Merlot....you may wind with the best wine you'll ever make and then can't ever do it again....that would drive me nuts!Thanks for the heads up. I have some Merlot concentrate . I have racked and added the sulfites already to the mustang . Will it hurt to restart fermentation after I add the merlot?