I started my blueberry wine a while back,added wine yeast and some yeat nutrient to the batch.I filtered off the berries a couple of days ago when I noticed that it wasn't working anymore by watching the airlock and no more bubbles was coming out ot very few anyway. So I go it settling in a new bucket,my question is can I or do i add my fining agent(#5 Isinglass) that I bought? If so how much per gallon and how long do I leave it sit?