Looks like about 4 gal, but that includes skins (she has a few grape vines but was only able to harvest that much after bees/wasps).
I think she's only hoping to make a bottle or so.
How would I measure the ppm?
My mother-in-law accidentally added 1.5 tsp of metabisulfite to her grape juice before inoculating with yeast. Can the grape juice be salvaged? Or is it ruined?
Thanks,
-Paul