Ok, I started another thread about converting cider to vinegar, but wonder if what I have is salvageable? Cider is fresh pasteurized local market ( Akron Ohio) sweet cider, Safeale 04 yeast, fermented 6 weeks or so then racked to secondary. Primary temps mid 60s f , then hanging out in a better bottle with good airlock for the past 5-6 months....resting with no disturbance at room temp of 65 to 85 f. Tried a bit the other day and it was 1.000 SG, but had a middle of the mouth & toung sour/tart taste. Adding table sugar to the sample didn't help. Can I salvage it with a tannin addition? Should I bottle it and see what more time does? Should I dump it and mourn what could have been? Desperate for any advise if it is salvageable.