So I have read where you can use vodka to top off carboy after racking. Was wondering if anybody had done it and if so could tell me how it went. Today I bought a strawberry and a mango vodka. (Strawberry mango wine in the carboy right now)
It depends what you want to end up with I suppose. That will also depend on how much you need to top up. A few ounces won't hurt. Would you enjoy either of the vodkas by themselves? If not, why add it to the wine.
Unless you’re planning on using Nikolai vodka, it would be much cheaper to add a crisp white wine as @sour_grapes suggested. A white Bota Box is only $13-$15 depending on where you purchase. And, it’s a much better choice for wine...
Best way to go is to start out larger quantity than your desired end amount ( For 3 gallon batches I like to have 1/3 to 1/2 gallon extra for topping off). Have various size bottles that your extra wine (topping-off wine) will fill then fit that with an airlock while the extra and you main carboy age. A little cumbersome but in reality after your first 2-3 rackings your loss should be minimal as all sediment should be gone. but you will have wine to top off with the same wine as you go. When you end up with an amount to small to put in a smaller container (you used 8-10 ounces from a 12 - top-off bottle) then just drink the leftover topping off wine. You'll get a good idea of how your wine is aging as well.