I am brewing 5 gallons of pasteurized cider, I started the fermentation last November and racked it into the secondary in January. I tossed in campden tablets prior to tossing in yeast for redundancy. About a month ago I noticed a film on top of the cider, though it may have been dead or active yeast. It didn’t look like a pellicle. My local brewing store suggested campdem tablets which I tossed in 3 weeks ago. It looked great after, the cider smells great and is very clear. I haven’t checked it for a couple days, this morning I did and noticed some tiny bubbles grouped together in a small area along the top of the cider. I am planning to bottle the cider in a couple weeks. Now I am a little worried that I might have an issue. Any thoughts? Remedies? Thanks!