Making my second batch of graff, and i used the recipe exactly with 120L instead of 60L (b/c I am using cheap juice concentrate.)
I pitched Notty and after about 24 got modest airlock activity that quit completely before 36 hours. I repitched and after 4 days have only VERY slow airlock activity (1 bubble every 20 sec or so) which seems to be slowing. Not the slightest bit of krausen and only a very few tiny bubbles on top of the cider. It seems that there is a very tiny bit of fermentation going on, but it is way too slow to get this whole think fermented, and it appears that it could stop completely at any moment. Acts like the juice was sorbated or something, but the bottles say very clearly "no preservatives" and the ingredients are just concentrate and water.
I am thinking of giving it 1 more day and then repitching with safale-05 instead of notty. Don't like throwing so much yeast at this cider, but it is definitely not working.