Hi this me firsdt batch of cider. I used 3 gallons of cider, 1 gallons of raspberry juice and 1 galloon of cranberry / raspberry juke. 2 lbs of brown sugar plus and used the champagne yeast. Basicly i mixed everything together. I am not sure what the gravity currently on the batch. Its in the carboy already 8 days bubbling like crazy. How long should keep it in there? can i just pop the air valve to take simple? or it nor recommended?