Thought I'd add another possibility. I usually make white wine which is why i can add apple juice etc. But when I am making red wine I've had great results by adding concentrated tart cherry and or pomegranate juice. Both are available from health food stores, tho I just order from Puritans pride. Even I shudder a little bit at the thought of adding too much concord grape juice to a decent red wine.
Pam in cinti
Pam in cinti