I just made my first batch of cider. It was in fermintation for 1 week, and I was putting it into a second stage and I decided to taste it. It had a very tart taste to it. I dont know if this will mellow out or did I screw up? It is a sweet cider and I used a Ale yeast. The cider I used was a all natural, nothing added, not pasturized, and no preservitives. Can it be saved, and how do I do it?