I have made some wine using Jack recipe's using bottled Welches juice.
But after 2 months the AC is stopped at 6%.
This is the 3rd batch and each one started at 17% and dropped to 11%
which resulted in only 6% AC.

It will bubble for about a month then stop.
When it stops bubbling is it done with the conversion of sugar, or is
it still working.

For this last batch I introduced another yeast starter at 2 months to
see if i could get it going again.

I started out using 4 cups of sugar per gallon, but have sinced
lowered it 3 cups.

ANY help would be great