I don't know what happened. I started a batch of rhubarb wine using a recipe I've used before. It was in 3 gallon carboys waiting for it to reach SG 1.000. I was out of town for a week and when I came back I noticed that the airlocks were full of tan fluid as though it had bubbled up really hard. The SG is less than .99. It smells OK. Should I just rack it? or do I need to add something. If anything the temp where I have the carboys was maybe a little low, in the mid 60's