My first batch is an English Bitter that has been in the secondary fermentation for 9 days. I noticed about 4-5 days ago, that a small layer of krausen had formed and it has grown every day since. It is not much, in fact it doesnt even cover the entire surface of the beer, but it was enough to alarm me. I didnt think any of this should form during secondary. Also, like I said it has been 9 days, and the beer is not noticeably any clearer. Is there anything I need to be worried about?