I recently made an experimental batch.
Approximate Recipe: 1.75 gallons, 3lb mixed red and green grapes, 1.75oz Corn Sugar, 1lb sugar, 1tbs "maple syrup", 10 grams Redstar Curvee' yeast. Specific gravity of 1.032.
Last night I racked to the secondary and made a few changes because it tasted watery as fawk. I added 2 tbs tannins, 4 tbs yeast nutrients, and 1 cup of sugar, and around 4tbs "maple syrup" (its all I had) I gave it a good swirl and its doing its thing. The problem is I believe it is still going to suck. How can I fix it? Should I get more grapes? I had thought about some 100% grape juice. I don't really want to dump it, but I certainly do not want to bottle it in the condition it is in.